Backport changes in Chapter 5 to previous chapters and update Chapter5 documentation (#34)

* Backport changes from chapter 5 to older chapters (#30)

* Fix wrong indent

* Backport to chapter 4

* Backport to chapter 3

* Backport to chapter 2

* Backport to chapter 1

* Add if statement to comment (#32)

* Update visuals for chapters 1,2 & 3.
Reenable drawing of edges from constants to Start for these chapters.

* Update visuals for chapters 4.
Revise text to explain the labeling of edges in graphs and that we omit edge from Constant to Start nodes from chapter 4.

* Add code snippets for if statement parsing and the duplication and merging of ScopeNodes.
Explain how scopeNodes are duplicated and merged.

* Add constant check to minus node (#31)

* Fix closing root block with } (#33)

* Backport fix closing root block with } to chapter 4 and 3 (#35)

* Show use-def edge from Phi to Region as dotted edge.
Add example of Phi peephole.
Update visuals.
Add more examples.

* Fix visuals in chapter 1 and README in chapter 4.

* Remove subheading

* Adjust spaces

---------

Co-authored-by: XmiliaH <45106915+XmiliaH@users.noreply.github.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/chapter01/README.md b/chapter01/README.md
index e09b61a3..f5f31f82 100644
--- a/chapter01/README.md
+++ b/chapter01/README.md
@@ -164,5 +164,7 @@ return 1;
 
 ![Sea of Nodes Visual](./docs/01-graph.svg)
 
-* Control nodes appear as square boxes
+* Control nodes appear as square boxes with yellow background
 * Control edges are in bold red
+* The edges from Constants to Start are shown in dotted lines as these are not true control edges
+* We label each edge with its position in the `_inputs` array, thus `0` means the edge is `_inputs[0]`.