[PATCH] Documentation/difftool: add deltawalker to list of valid diff tools

deltawalker has been supported since 284a126c3ef3, but was not added
to the list of valid diff tools reported by 'git difftool --help'.

Signed-off-by: Tim Henigan <redacted>
---

The list of valid tools seems prone to error. Right now, there is nothing
that tells people to update this documentation when new config files are
added to 'mergetools'.  Should I add a README to 'mergetools' with
instructions to update this file?  Or would it be better to replace the
list in the help string with a more general statement like "<tool> must
match one of the files located in $(git --exec-path)/mergetools"?


 Documentation/git-difftool.txt |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Documentation/git-difftool.txt b/Documentation/git-difftool.txt
index 19d473c..fe38f66 100644
--- a/Documentation/git-difftool.txt
+++ b/Documentation/git-difftool.txt

@@ -32,8 +32,9 @@ OPTIONS
 --tool=<tool>::
 	Use the diff tool specified by <tool>.
 	Valid diff tools are:
-	araxis, bc3, diffuse, emerge, ecmerge, gvimdiff, kdiff3,
-	kompare, meld, opendiff, p4merge, tkdiff, vimdiff and xxdiff.
+	araxis, bc3, deltawalker, diffuse, emerge, ecmerge, gvimdiff,
+	kdiff3,	kompare, meld, opendiff, p4merge, tkdiff, vimdiff and
+	xxdiff.
 +
 If a diff tool is not specified, 'git difftool'
 will use the configuration variable `diff.tool`.  If the

-- 
1.7.10.rc1