mergetool--lib: add p4merge as a pre-configured mergetool option

diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index e3ddecc995eb30391639983d9f6f0db7567d7b9a..2a9a88968f40ec82ad980b3408a0fc389be02c32 100755 (executable)
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -953,7 +953,7 @@ _git_diff ()
 }
 
 __git_mergetools_common="diffuse ecmerge emerge kdiff3 meld opendiff
-                       tkdiff vimdiff gvimdiff xxdiff araxis
+                       tkdiff vimdiff gvimdiff xxdiff araxis p4merge
 "
 
 _git_difftool ()