Add line numbers in report and two test cases

mjtest/test/tests.py

@@ -273,9 +273,9 @@ class BasicTestResult(TestResult):
             return "incorrect return code"
 
     def long_message(self) -> str:
-        file_content = ""
+        file_content = []
         with open(self.test_case.file, "r") as f:
-            file_content = f.readlines()
+            file_content = [line.rstrip() for line in f]
         others = []
         for title, content, long_text in self.other_texts:
             if long_text:
@@ -316,6 +316,9 @@ Return code: {}
 
     def _ident(self, text: Union[str,List[str]]) -> str:
         arr = text if isinstance(text, list) else text.split("\n")
-        return "    " + "\n    ".join(arr)
+        if len(arr) == 0 or text == "":
+            return ""
+        arr = ["[{:04d}]    {:s}".format(i + 1, l) for (i, l) in enumerate(arr)]
+        return "\n".join(arr)
 
 import mjtest.test.syntax_tests
\ No newline at end of file