fix: Initialize start_line and del_start to prevent UnboundLocalError

gtm

@@ -31,6 +31,10 @@ def get_diff_info(current_commit, prev_commit, filename):
     added_lines = []
     deleted_lines = []
     
+    # Initialize variables outside the loop to avoid UnboundLocalError
+    start_line = 0
+    del_start = 0
+    
     for line in result_additions.stdout.splitlines():
         # Parse the diff output to find line numbers of additions and deletions
         if line.startswith('@@'):