Check the result of formatting the code

The old format-code.sh script used to run git diff to determine if any
files had been reformatted in the commit.  The "new" way should do the
same.

Tested:
Ran a build on entity-manager, which includes a custom format-code
script, and saw the build pass.  Backed up to the commit prior, which
included formatting violations, reran and saw the build fail.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: I3697da5dbbe78bb2241bb66d2583b2c9c2f9e753
diff --git a/scripts/unit-test.py b/scripts/unit-test.py
index d8c4712..6f15960 100755
--- a/scripts/unit-test.py
+++ b/scripts/unit-test.py
@@ -1225,6 +1225,10 @@
         for f in format_scripts:
             check_call_cmd(f, CODE_SCAN_DIR)
 
+        # Check to see if any files changed
+        check_call_cmd("git", "-C", CODE_SCAN_DIR,
+                       "--no-pager", "diff", "--exit-code")
+
     # Check if this repo has a supported make infrastructure
     pkg = Package(UNIT_TEST_PKG, CODE_SCAN_DIR)
     if not pkg.build_system():