patch 8.2.2490: 'wrap' option is always reset when starting diff mode
Problem: 'wrap' option is always reset when starting diff mode.
Solution: Add the "followwrap" item in 'diffopt'. (Rick Howe, closes #7797)
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 74bab42..f25b1ba 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -2677,6 +2677,8 @@
foldcolumn:{n} Set the 'foldcolumn' option to {n} when
starting diff mode. Without this 2 is used.
+ followwrap Follow the 'wrap' option and leave as it is.
+
internal Use the internal diff library. This is
ignored when 'diffexpr' is set. *E960*
When running out of memory when writing a