utils: checkstyle.py: Add __repr__ method to Commit class

When debugging issues with the Commit class, a __repr__ method proved to
be useful to quickly print all the parsed information about a commit. To
avoid reimplementing the method over and over again in the future, add
it to the class, even if it is not actually used.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>

utils/checkstyle.py

@@ -248,6 +248,17 @@ class Commit:
                              stdout=subprocess.PIPE).stdout.decode('utf-8')
         self._files = [CommitFile(f) for f in ret.splitlines()]
 
+    def __repr__(self):
+        return '\n'.join([
+            f'commit {self.commit}',
+            f'Author: {self.author}',
+            f'',
+            f'    {self.title}',
+            '',
+            '\n'.join([line and f'    {line}' or '' for line in self._body]),
+            'Trailers:',
+        ] + self.trailers)
+
     def files(self, filter='AMR'):
         return [f.filename for f in self._files if f.status in filter]