diff --git a/diff_cover/diff_reporter.py b/diff_cover/diff_reporter.py
index 411586e3..3ecf2cc9 100644
--- a/diff_cover/diff_reporter.py
+++ b/diff_cover/diff_reporter.py
@@ -349,22 +349,20 @@ def _parse_source_sections(self, diff_str):
 
             # Every other line is stored in the dictionary for this source file
             # once we find a hunk section
-            else:
-                # Only add lines if we're in a hunk section
-                # (ignore index and files changed lines)
-                if found_hunk or line.startswith("@@"):
-                    # Remember that we found a hunk
-                    found_hunk = True
-
-                    if src_path is not None:
-                        source_dict[src_path].append(line)
-
-                    else:
-                        # We tolerate other information before we have
-                        # a source file defined, unless it's a hunk line
-                        if line.startswith("@@"):
-                            msg = f"Hunk has no source file: '{line}'"
-                            raise GitDiffError(msg)
+            # Only add lines if we're in a hunk section
+            # (ignore index and files changed lines)
+            elif found_hunk or line.startswith("@@"):
+                # Remember that we found a hunk
+                found_hunk = True
+
+                if src_path is not None:
+                    source_dict[src_path].append(line)
+
+                # We tolerate other information before we have
+                # a source file defined, unless it's a hunk line
+                elif line.startswith("@@"):
+                    msg = f"Hunk has no source file: '{line}'"
+                    raise GitDiffError(msg)
 
         return source_dict
 
diff --git a/diff_cover/git_diff.py b/diff_cover/git_diff.py
index 86ced3fe..cf285519 100644
--- a/diff_cover/git_diff.py
+++ b/diff_cover/git_diff.py
@@ -65,9 +65,7 @@ def diff_committed(self, compare_branch="origin/main"):
         Raises a `GitDiffError` if `git diff` outputs anything
         to stderr.
         """
-        diff_range = "{branch}{notation}HEAD".format(
-            branch=compare_branch, notation=self.range_notation
-        )
+        diff_range = f"{compare_branch}{self.range_notation}HEAD"
         try:
             return execute(
                 self._default_git_args + self._default_diff_args + [diff_range]