add another comment below lineno

Author: joseph-sentry

codecov_cli/services/upload/upload_collector.py

@@ -116,6 +116,8 @@ def _get_file_fixes(
                 # file is empty thus the eof should be 0
                 # so lineno will be set to -1 here
                 lineno = -1
+                # overwrite lineno in this for loop
+                # if f is empty, lineno stays at -1
                 for lineno, line_content in enumerate(f):
                     if any(
                         pattern.match(line_content)