scripts: ci: Fix clang-format compliance for additions or removals

If a diff only has added or removed lines we need to match both '-' and '+'
characters in the hunk context.

Signed-off-by: Pieter De Gendt <[email protected]>

Author: pdgendt

scripts/ci/check_compliance.py

@@ -303,8 +303,8 @@ def run(self):
                 for patch in patchset:
                     for hunk in patch:
                         # Strip the before and after context
-                        before = next(i for i,v in enumerate(hunk) if str(v).startswith('-'))
-                        after = next(i for i,v in enumerate(reversed(hunk)) if str(v).startswith('+'))
+                        before = next(i for i,v in enumerate(hunk) if str(v).startswith(('-', '+')))
+                        after = next(i for i,v in enumerate(reversed(hunk)) if str(v).startswith(('-', '+')))
                         msg = "".join([str(l) for l in hunk[before:-after or None]])
 
                         # show the hunk at the last line