Chapter renumber, and split ch 17

Renumber chapters 10a, 10b, 11, 12, 13, 14 -> 10, 11, 13, 12, [11,14].
Split ch 17 into a 17a and 17b; shuffle around im/mutable syntax to be consistent, and present it more slowly.
THe new immutable syntax is pushed through all later chapters

1 files changed, 17 insertions, 0 deletions

diff --git a/chapter13/docs/graph3-snip.json b/chapter13/docs/graph3-snip.json
new file mode 100644
index 00000000..548dbdf3
--- /dev/null
+++ b/chapter13/docs/graph3-snip.json
@@ -0,0 +1,17 @@
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