Use tuple instead of list

Author: gartung

report-pull-request-results.py

@@ -303,18 +303,18 @@ def read_maxmem_comparison_file(unit_tests_file):
     for line in openlog(unit_tests_file):
         if "exceeds" in line.lower():
             err_cnt += 1
-            message_line = ["-"]
-            message_line.extend(line.split(":", 1)[-1].strip().split(" "))
-            message_line.extend(["\n"])
+            message_line = ("-",)
+            message_line += line.split(":", 1)[-1].strip().split(" ")
+            message_line += ("\n",)
             errors_found.add(message_line)
     if err_cnt > 0:
         message = (
             "\n## Max Memory Comparisons exceeding threshold\n\n"
             "@cms-sw/core-l2 , I found %s workflow step(s) with memory usage exceeding the error threshold:\n"
             % err_cnt
         )
-        for message in sorted(errors_found, key=lambda s: s[2]):
-            message += " ".join(message)
+        for message_line in sorted(errors_found, key=lambda s: s[2]):
+            message += " ".join(message_line)
         send_message_pr(message)