git-sh-setup.sh: add variable to use the stuck-long mode

diff --git a/Documentation/git-sh-setup.txt b/Documentation/git-sh-setup.txt
index 79a88b92054234b0cc50e6ce8872f44979904564..4f67c4cde679cf03e8cc43ac0630a45b5e68aa2d 100644 (file)
--- a/Documentation/git-sh-setup.txt
+++ b/Documentation/git-sh-setup.txt
@@ -84,6 +84,12 @@ get_author_ident_from_commit::
        outputs code for use with eval to set the GIT_AUTHOR_NAME,
        GIT_AUTHOR_EMAIL and GIT_AUTHOR_DATE variables for a given commit.
 
+create_virtual_base::
+       modifies the first file so only lines in common with the
+       second file remain. If there is insufficient common material,
+       then the first file is left empty. The result is suitable
+       as a virtual base input for a 3-way merge.
+
 GIT
 ---
 Part of the linkgit:git[1] suite