patch 8.2.3900: it is not easy to use a script-local function for an option
Problem: It is not easy to use a script-local function for an option.
Solution: recognize s: and <SID> at the start of the expression. (Yegappan
Lakshmanan, closes #9401)
diff --git a/runtime/doc/diff.txt b/runtime/doc/diff.txt
index 2a231b1..e3d8f53 100644
--- a/runtime/doc/diff.txt
+++ b/runtime/doc/diff.txt
@@ -398,6 +398,11 @@
The `redraw!` command may not be needed, depending on whether executing a
shell command shows something on the display or not.
+If the 'diffexpr' expression starts with s: or |<SID>|, then it is replaced
+with the script ID (|local-function|). Example: >
+ set diffexpr=s:MyDiffExpr()
+ set diffexpr=<SID>SomeDiffExpr()
+<
*E810* *E97*
Vim will do a test if the diff output looks alright. If it doesn't, you will
get an error message. Possible causes:
@@ -449,4 +454,9 @@
directory are accidentally patched. Vim will also delete files starting with
v:fname_in and ending in ".rej" and ".orig".
+If the 'patchexpr' expression starts with s: or |<SID>|, then it is replaced
+with the script ID (|local-function|). Example: >
+ set patchexpr=s:MyPatchExpr()
+ set patchexpr=<SID>SomePatchExpr()
+<
vim:tw=78:ts=8:noet:ft=help:norl: