patch 8.2.3917: the eval.txt help file is way too big
Problem: The eval.txt help file is way too big.
Solution: Move the builtin function details to a separate file.
diff --git a/runtime/doc/Makefile b/runtime/doc/Makefile
index e0c0f84..de986a6 100644
--- a/runtime/doc/Makefile
+++ b/runtime/doc/Makefile
@@ -16,6 +16,7 @@
DOCS = \
arabic.txt \
autocmd.txt \
+ builtin.txt \
change.txt \
channel.txt \
cmdline.txt \
@@ -161,6 +162,7 @@
HTMLS = \
arabic.html \
autocmd.html \
+ builtin.html \
change.html \
channel.html \
cmdline.html \