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-rw-r--r--runtime/doc/diff.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/runtime/doc/diff.txt b/runtime/doc/diff.txt
index 2f174a404e..c9de54342e 100644
--- a/runtime/doc/diff.txt
+++ b/runtime/doc/diff.txt
@@ -369,6 +369,9 @@ Additionally, 'diffexpr' should take care of "icase" and "iwhite" in the
'diffopt' option. 'diffexpr' cannot change the value of 'lines' and
'columns'.
+The advantage of using a function call without arguments is that it is faster,
+see |expr-option-function|.
+
Example (this does almost the same as 'diffexpr' being empty): >
set diffexpr=MyDiff()
@@ -434,6 +437,9 @@ will have the same effect. These variables are set to the file names used:
v:fname_diff patch file
v:fname_out resulting patched file
+The advantage of using a function call without arguments is that it is faster,
+see |expr-option-function|.
+
Example (this does the same as 'patchexpr' being empty): >
set patchexpr=MyPatch()