Docs: Add -X option to git-merge's synopsis.

diff --git a/Documentation/gitattributes.txt b/Documentation/gitattributes.txt
index 814714c56e503d1717acc9a1474538f180a4590d..d892e642eded92fd0409e39fc34c005f88bc4a9b 100644 (file)
--- a/Documentation/gitattributes.txt
+++ b/Documentation/gitattributes.txt
@@ -511,7 +511,8 @@ command to run to merge ancestor's version (`%O`), current
 version (`%A`) and the other branches' version (`%B`).  These
 three tokens are replaced with the names of temporary files that
 hold the contents of these versions when the command line is
-built.
+built. Additionally, %L will be replaced with the conflict marker
+size (see below).
 
 The merge driver is expected to leave the result of the merge in
 the file named with `%A` by overwriting it, and exit with zero
@@ -525,6 +526,23 @@ When left unspecified, the driver itself is used for both
 internal merge and the final merge.
 
 
+`conflict-marker-size`
+^^^^^^^^^^^^^^^^^^^^^^
+
+This attribute controls the length of conflict markers left in
+the work tree file during a conflicted merge.  Only setting to
+the value to a positive integer has any meaningful effect.
+
+For example, this line in `.gitattributes` can be used to tell the merge
+machinery to leave much longer (instead of the usual 7-character-long)
+conflict markers when merging the file `Documentation/git-merge.txt`
+results in a conflict.
+
+------------------------
+Documentation/git-merge.txt    conflict-marker-size=32
+------------------------
+
+
 Checking whitespace errors
 ~~~~~~~~~~~~~~~~~~~~~~~~~~