From c3958e34c0de21df52e57e47e4f47ffe6464f138 Mon Sep 17 00:00:00 2001
From: Cliff Click <cliffc@acm.org>
Date: Sat, 3 Oct 2026 09:29:42 -0700
Subject: Graph updates; readme updates

---
 chapter02/docs/02-demonstration-peephole.svg            | 2 +-
 chapter02/docs/02-demonstration-pre-peephole-nokill.svg | 2 +-
 chapter02/docs/02-demonstration-pre-peephole.svg        | 2 +-
 chapter02/docs/02-post-peephole-ex1.svg                 | 2 +-
 chapter02/docs/02-pre-peephole-ex1.svg                  | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

(limited to 'chapter02')

diff --git a/chapter02/docs/02-demonstration-peephole.svg b/chapter02/docs/02-demonstration-peephole.svg
index dfc03cff..6742dc47 100644
--- a/chapter02/docs/02-demonstration-peephole.svg
+++ b/chapter02/docs/02-demonstration-peephole.svg
@@ -60,7 +60,7 @@
     .count { font-size:20px; min-width:35px; text-align:center; }
     #N { width:6ch; }
     #scrub { width:clamp(120px,35vw,600px); }
-  </style><defs><marker id="arrow-CTRL" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#b63838"/></marker><marker id="arrow-DATA" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#536477"/></marker><marker id="arrow-MEM" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#2867b2"/></marker><marker id="arrow-ASSOC" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#9396a3"/></marker><marker id="arrow-PARSER" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#7956a5"/></marker></defs><rect width="100%" height="100%" fill="rgb(250, 251, 252)"/><g><g class="regions" style="opacity: 1;"/><rect class="peep-area" rx="36" style="opacity: 0;"/><g class="edges"><path class="edge ASSOC" id="e5i0" d="M84,77 C84,101 236,3 236,27" stroke="#9396a3" marker-start="url(#arrow-ASSOC)" style="opacity: 1;"><title>#5[0] → #1 · ASSOC</title></path><path class="edge CTRL" id="e6i0" d="M84,80 L84,128" stroke="#b63838" marker-start="url(#arrow-CTRL)" style="opacity: 1;"><title>#6[0] → #1 · CTRL</title></path><path class="edge DATA" id="e6i1" d="M236,80 L236,90 L124,90 L124,128" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#6[1] → #5 · DATA</title></path></g><g class="edge-hits"/><g class="parser" style="opacity: 1;"/><g class="nodes"><g class="node" id="n1" data-id="1" transform="translate(24,30)" style="opacity: 1;"><path class="box" d="M0,0H120V44H0Z" fill="#fff1c4"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>Start</tspan><tspan class="node-id">  #1</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#1 Start
+  </style><defs><marker id="arrow-CTRL" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#b63838"/></marker><marker id="arrow-DATA" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#536477"/></marker><marker id="arrow-MEM" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#2867b2"/></marker><marker id="arrow-ASSOC" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#9396a3"/></marker><marker id="arrow-PARSER" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#7956a5"/></marker></defs><rect width="100%" height="100%" fill="rgb(250, 251, 252)"/><g><g class="regions" style="opacity: 1;"/><rect class="peep-area" rx="36" style="opacity: 0;"/><g class="edges"><path class="edge ASSOC" id="e5i0" d="M84,77 C84,101 236,3 236,27" stroke="#9396a3" marker-start="url(#arrow-ASSOC)" style="opacity: 1;"><title>#5[0] → #1 · ASSOC</title></path><path class="edge CTRL" id="e6i0" d="M84,80 L84,128" stroke="#b63838" marker-start="url(#arrow-CTRL)" style="opacity: 1;"><title>#6[0] → #1 · CTRL</title></path><path class="edge DATA" id="e6i1" d="M236,80 L236,85 Q236,90 231,90 L132,90 Q124,90 124,98 L124,128" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#6[1] → #5 · DATA</title></path></g><g class="edge-hits"/><g class="parser" style="opacity: 1;"/><g class="nodes"><g class="node" id="n1" data-id="1" transform="translate(24,30)" style="opacity: 1;"><path class="box" d="M0,0H120V44H0Z" fill="#fff1c4"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>Start</tspan><tspan class="node-id">  #1</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#1 Start
 Type not computed
 
 </title></g><g class="node" id="n5" data-id="5" transform="translate(176,30)" style="opacity: 1;"><path class="box" d="M14,0H106Q120,0 120,14V30Q120,44 106,44H14Q0,44 0,30V14Q0,0 14,0Z" fill="#edf3f7"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>#3</tspan><tspan class="node-id">  #5</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#5 #3
diff --git a/chapter02/docs/02-demonstration-pre-peephole-nokill.svg b/chapter02/docs/02-demonstration-pre-peephole-nokill.svg
index a40e5981..f581be2c 100644
--- a/chapter02/docs/02-demonstration-pre-peephole-nokill.svg
+++ b/chapter02/docs/02-demonstration-pre-peephole-nokill.svg
@@ -60,7 +60,7 @@
     .count { font-size:20px; min-width:35px; text-align:center; }
     #N { width:6ch; }
     #scrub { width:clamp(120px,35vw,600px); }
-  </style><defs><marker id="arrow-CTRL" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#b63838"/></marker><marker id="arrow-DATA" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#536477"/></marker><marker id="arrow-MEM" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#2867b2"/></marker><marker id="arrow-ASSOC" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#9396a3"/></marker><marker id="arrow-PARSER" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#7956a5"/></marker></defs><rect width="100%" height="100%" fill="rgb(250, 251, 252)"/><g><g class="regions" style="opacity: 1;"/><rect class="peep-area" rx="36" style="opacity: 0;"/><g class="edges"><path class="edge ASSOC" id="e2i0" d="M84,77 C84,101 388,3 388,27" stroke="#9396a3" marker-start="url(#arrow-ASSOC)" style="opacity: 1;"><title>#2[0] → #1 · ASSOC</title></path><path class="edge ASSOC" id="e3i0" d="M84,77 C84,101 540,3 540,27" stroke="#9396a3" marker-start="url(#arrow-ASSOC)" style="opacity: 1;"><title>#3[0] → #1 · ASSOC</title></path><path class="edge DATA" id="e4i1" d="M388,80 L388,128" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#4[1] → #2 · DATA</title></path><path class="edge DATA" id="e4i2" d="M540,80 L540,90 L418,90 L418,128" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#4[2] → #3 · DATA</title></path><path class="edge ASSOC" id="e5i0" d="M84,77 C84,101 236,3 236,27" stroke="#9396a3" marker-start="url(#arrow-ASSOC)" style="opacity: 1;"><title>#5[0] → #1 · ASSOC</title></path><path class="edge CTRL" id="e6i0" d="M84,80 L84,128" stroke="#b63838" marker-start="url(#arrow-CTRL)" style="opacity: 1;"><title>#6[0] → #1 · CTRL</title></path><path class="edge DATA" id="e6i1" d="M236,80 L236,90 L124,90 L124,128" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#6[1] → #5 · DATA</title></path></g><g class="edge-hits"/><g class="parser" style="opacity: 1;"/><g class="nodes"><g class="node" id="n1" data-id="1" transform="translate(24,30)" style="opacity: 1;"><path class="box" d="M0,0H120V44H0Z" fill="#fff1c4"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>Start</tspan><tspan class="node-id">  #1</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#1 Start
+  </style><defs><marker id="arrow-CTRL" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#b63838"/></marker><marker id="arrow-DATA" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#536477"/></marker><marker id="arrow-MEM" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#2867b2"/></marker><marker id="arrow-ASSOC" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#9396a3"/></marker><marker id="arrow-PARSER" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#7956a5"/></marker></defs><rect width="100%" height="100%" fill="rgb(250, 251, 252)"/><g><g class="regions" style="opacity: 1;"/><rect class="peep-area" rx="36" style="opacity: 0;"/><g class="edges"><path class="edge ASSOC" id="e2i0" d="M84,77 C84,101 388,3 388,27" stroke="#9396a3" marker-start="url(#arrow-ASSOC)" style="opacity: 1;"><title>#2[0] → #1 · ASSOC</title></path><path class="edge ASSOC" id="e3i0" d="M84,77 C84,101 540,3 540,27" stroke="#9396a3" marker-start="url(#arrow-ASSOC)" style="opacity: 1;"><title>#3[0] → #1 · ASSOC</title></path><path class="edge DATA" id="e4i1" d="M388,80 L388,128" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#4[1] → #2 · DATA</title></path><path class="edge DATA" id="e4i2" d="M540,80 L540,85 Q540,90 535,90 L426,90 Q418,90 418,98 L418,128" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#4[2] → #3 · DATA</title></path><path class="edge ASSOC" id="e5i0" d="M84,77 C84,101 236,3 236,27" stroke="#9396a3" marker-start="url(#arrow-ASSOC)" style="opacity: 1;"><title>#5[0] → #1 · ASSOC</title></path><path class="edge CTRL" id="e6i0" d="M84,80 L84,128" stroke="#b63838" marker-start="url(#arrow-CTRL)" style="opacity: 1;"><title>#6[0] → #1 · CTRL</title></path><path class="edge DATA" id="e6i1" d="M236,80 L236,85 Q236,90 231,90 L132,90 Q124,90 124,98 L124,128" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#6[1] → #5 · DATA</title></path></g><g class="edge-hits"/><g class="parser" style="opacity: 1;"/><g class="nodes"><g class="node" id="n1" data-id="1" transform="translate(24,30)" style="opacity: 1;"><path class="box" d="M0,0H120V44H0Z" fill="#fff1c4"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>Start</tspan><tspan class="node-id">  #1</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#1 Start
 Type not computed
 
 </title></g><g class="node" id="n2" data-id="2" transform="translate(328,30)" style="opacity: 1;"><path class="box" d="M14,0H106Q120,0 120,14V30Q120,44 106,44H14Q0,44 0,30V14Q0,0 14,0Z" fill="#edf3f7"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>#1</tspan><tspan class="node-id">  #2</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#2 #1
diff --git a/chapter02/docs/02-demonstration-pre-peephole.svg b/chapter02/docs/02-demonstration-pre-peephole.svg
index 8809a0c0..a8319f8b 100644
--- a/chapter02/docs/02-demonstration-pre-peephole.svg
+++ b/chapter02/docs/02-demonstration-pre-peephole.svg
@@ -60,7 +60,7 @@
     .count { font-size:20px; min-width:35px; text-align:center; }
     #N { width:6ch; }
     #scrub { width:clamp(120px,35vw,600px); }
-  </style><defs><marker id="arrow-CTRL" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#b63838"/></marker><marker id="arrow-DATA" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#536477"/></marker><marker id="arrow-MEM" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#2867b2"/></marker><marker id="arrow-ASSOC" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#9396a3"/></marker><marker id="arrow-PARSER" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#7956a5"/></marker></defs><rect width="100%" height="100%" fill="rgb(250, 251, 252)"/><g><g class="regions" style="opacity: 1;"/><rect class="peep-area" rx="36" style="opacity: 0;"/><g class="edges"><path class="edge ASSOC" id="e2i0" d="M84,181 C84,205 114,3 114,27" stroke="#9396a3" marker-start="url(#arrow-ASSOC)" style="opacity: 1;"><title>#2[0] → #1 · ASSOC</title></path><path class="edge ASSOC" id="e3i0" d="M84,181 C84,205 266,3 266,27" stroke="#9396a3" marker-start="url(#arrow-ASSOC)" style="opacity: 1;"><title>#3[0] → #1 · ASSOC</title></path><path class="edge DATA" id="e4i1" d="M114,80 L114,90 L236,90 L236,128" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#4[1] → #2 · DATA</title></path><path class="edge DATA" id="e4i2" d="M266,80 L266,128" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#4[2] → #3 · DATA</title></path><path class="edge CTRL" id="e5i0" d="M84,184 L84,232" stroke="#b63838" marker-start="url(#arrow-CTRL)" style="opacity: 1;"><title>#5[0] → #1 · CTRL</title></path><path class="edge DATA" id="e5i1" d="M236,184 L236,194 L124,194 L124,232" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#5[1] → #4 · DATA</title></path></g><g class="edge-hits"/><g class="parser" style="opacity: 1;"/><g class="nodes"><g class="node" id="n1" data-id="1" transform="translate(24,134)" style="opacity: 1;"><path class="box" d="M0,0H120V44H0Z" fill="#fff1c4"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>Start</tspan><tspan class="node-id">  #1</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#1 Start
+  </style><defs><marker id="arrow-CTRL" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#b63838"/></marker><marker id="arrow-DATA" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#536477"/></marker><marker id="arrow-MEM" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#2867b2"/></marker><marker id="arrow-ASSOC" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#9396a3"/></marker><marker id="arrow-PARSER" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#7956a5"/></marker></defs><rect width="100%" height="100%" fill="rgb(250, 251, 252)"/><g><g class="regions" style="opacity: 1;"/><rect class="peep-area" rx="36" style="opacity: 0;"/><g class="edges"><path class="edge ASSOC" id="e2i0" d="M84,181 C84,205 114,3 114,27" stroke="#9396a3" marker-start="url(#arrow-ASSOC)" style="opacity: 1;"><title>#2[0] → #1 · ASSOC</title></path><path class="edge ASSOC" id="e3i0" d="M84,181 C84,205 266,3 266,27" stroke="#9396a3" marker-start="url(#arrow-ASSOC)" style="opacity: 1;"><title>#3[0] → #1 · ASSOC</title></path><path class="edge DATA" id="e4i1" d="M114,80 L114,85 Q114,90 119,90 L228,90 Q236,90 236,98 L236,128" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#4[1] → #2 · DATA</title></path><path class="edge DATA" id="e4i2" d="M266,80 L266,128" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#4[2] → #3 · DATA</title></path><path class="edge CTRL" id="e5i0" d="M84,184 L84,232" stroke="#b63838" marker-start="url(#arrow-CTRL)" style="opacity: 1;"><title>#5[0] → #1 · CTRL</title></path><path class="edge DATA" id="e5i1" d="M236,184 L236,189 Q236,194 231,194 L132,194 Q124,194 124,202 L124,232" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#5[1] → #4 · DATA</title></path></g><g class="edge-hits"/><g class="parser" style="opacity: 1;"/><g class="nodes"><g class="node" id="n1" data-id="1" transform="translate(24,134)" style="opacity: 1;"><path class="box" d="M0,0H120V44H0Z" fill="#fff1c4"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>Start</tspan><tspan class="node-id">  #1</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#1 Start
 Type not computed
 
 </title></g><g class="node" id="n2" data-id="2" transform="translate(54,30)" style="opacity: 1;"><path class="box" d="M14,0H106Q120,0 120,14V30Q120,44 106,44H14Q0,44 0,30V14Q0,0 14,0Z" fill="#edf3f7"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>#1</tspan><tspan class="node-id">  #2</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#2 #1
diff --git a/chapter02/docs/02-post-peephole-ex1.svg b/chapter02/docs/02-post-peephole-ex1.svg
index 6674839e..2f9fc49d 100644
--- a/chapter02/docs/02-post-peephole-ex1.svg
+++ b/chapter02/docs/02-post-peephole-ex1.svg
@@ -60,7 +60,7 @@
     .count { font-size:20px; min-width:35px; text-align:center; }
     #N { width:6ch; }
     #scrub { width:clamp(120px,35vw,600px); }
-  </style><defs><marker id="arrow-CTRL" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#b63838"/></marker><marker id="arrow-DATA" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#536477"/></marker><marker id="arrow-MEM" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#2867b2"/></marker><marker id="arrow-ASSOC" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#9396a3"/></marker><marker id="arrow-PARSER" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#7956a5"/></marker></defs><rect width="100%" height="100%" fill="rgb(250, 251, 252)"/><g><g class="regions" style="opacity: 1;"/><rect class="peep-area" rx="36" style="opacity: 0;"/><g class="edges"><path class="edge ASSOC" id="e13i0" d="M84,77 C84,101 236,3 236,27" stroke="#9396a3" marker-start="url(#arrow-ASSOC)" style="opacity: 1;"><title>#13[0] → #1 · ASSOC</title></path><path class="edge CTRL" id="e14i0" d="M84,80 L84,128" stroke="#b63838" marker-start="url(#arrow-CTRL)" style="opacity: 1;"><title>#14[0] → #1 · CTRL</title></path><path class="edge DATA" id="e14i1" d="M236,80 L236,90 L124,90 L124,128" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#14[1] → #13 · DATA</title></path></g><g class="edge-hits"/><g class="parser" style="opacity: 1;"/><g class="nodes"><g class="node" id="n1" data-id="1" transform="translate(24,30)" style="opacity: 1;"><path class="box" d="M0,0H120V44H0Z" fill="#fff1c4"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>Start</tspan><tspan class="node-id">  #1</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#1 Start
+  </style><defs><marker id="arrow-CTRL" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#b63838"/></marker><marker id="arrow-DATA" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#536477"/></marker><marker id="arrow-MEM" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#2867b2"/></marker><marker id="arrow-ASSOC" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#9396a3"/></marker><marker id="arrow-PARSER" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#7956a5"/></marker></defs><rect width="100%" height="100%" fill="rgb(250, 251, 252)"/><g><g class="regions" style="opacity: 1;"/><rect class="peep-area" rx="36" style="opacity: 0;"/><g class="edges"><path class="edge ASSOC" id="e13i0" d="M84,77 C84,101 236,3 236,27" stroke="#9396a3" marker-start="url(#arrow-ASSOC)" style="opacity: 1;"><title>#13[0] → #1 · ASSOC</title></path><path class="edge CTRL" id="e14i0" d="M84,80 L84,128" stroke="#b63838" marker-start="url(#arrow-CTRL)" style="opacity: 1;"><title>#14[0] → #1 · CTRL</title></path><path class="edge DATA" id="e14i1" d="M236,80 L236,85 Q236,90 231,90 L132,90 Q124,90 124,98 L124,128" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#14[1] → #13 · DATA</title></path></g><g class="edge-hits"/><g class="parser" style="opacity: 1;"/><g class="nodes"><g class="node" id="n1" data-id="1" transform="translate(24,30)" style="opacity: 1;"><path class="box" d="M0,0H120V44H0Z" fill="#fff1c4"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>Start</tspan><tspan class="node-id">  #1</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#1 Start
 Type not computed
 
 </title></g><g class="node" id="n13" data-id="13" transform="translate(176,30)" style="opacity: 1;"><path class="box" d="M14,0H106Q120,0 120,14V30Q120,44 106,44H14Q0,44 0,30V14Q0,0 14,0Z" fill="#edf3f7"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>#2</tspan><tspan class="node-id">  #13</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#13 #2
diff --git a/chapter02/docs/02-pre-peephole-ex1.svg b/chapter02/docs/02-pre-peephole-ex1.svg
index e2e5f785..0217cdd0 100644
--- a/chapter02/docs/02-pre-peephole-ex1.svg
+++ b/chapter02/docs/02-pre-peephole-ex1.svg
@@ -60,7 +60,7 @@
     .count { font-size:20px; min-width:35px; text-align:center; }
     #N { width:6ch; }
     #scrub { width:clamp(120px,35vw,600px); }
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 Type not computed
 
 </title></g><g class="node" id="n2" data-id="2" transform="translate(116,238)" style="opacity: 1;"><path class="box" d="M14,0H106Q120,0 120,14V30Q120,44 106,44H14Q0,44 0,30V14Q0,0 14,0Z" fill="#edf3f7"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>#1</tspan><tspan class="node-id">  #2</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#2 #1
-- 
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