Merge ~cjwatson/launchpad:format-new-and-modified-imports-git into launchpad:master

[Colin Watson]

Port format-new-and-modified-imports to git

The argument handling wasn't very useful (if you need that then you can
always just run utilities/format-imports directly), so I dropped it in
favour of utilities/find-changed-files.sh.

[Tom Wardill (twom)]

works for me!

review: Approve

diff --git a/utilities/format-new-and-modified-imports b/utilities/format-new-and-modified-imports
index d33d538..77185ce 100755
--- a/utilities/format-new-and-modified-imports
+++ b/utilities/format-new-and-modified-imports
@@ -1,13 +1,8 @@
-#!/usr/bin/env bash
-#
-# Reformat imports in new and modified files. Call without arguments
-# to operate on uncommitted changes. Arguments will be passed to bzr
-# status, so to operate on all new and modified files relative to the
-# submit branch, use:
-#
-#   format-new-and-modified-imports -r submit:
+#! /bin/sh
 #
+# Reformat imports in new and modified files.
 
-bzr status --short "$@" | \
-    awk '/^.[MN] .*[.]py$/ { print $NF }' | \
+"$(dirname "$0")/find-changed-files.sh" | \
+    xargs -n1 | \
+    grep '\.py$' | \
     xargs -r "$(dirname "$0")/format-imports"