also allow timestamp to be encompassed in []

logmetric.py

@@ -68,7 +68,7 @@ class LogMetric(evaluate.Metric):
     """TODO: Short description of my evaluation module."""
 
     # Constant regex to get timestrings
-    timestamp_regex = r'^\s*(\d{4}[-/.]\d{2}[-/.]\d{2}(?:[ T]\d{2}[:]\d{2}(?:[:]\d{2}(?:[.,]\d+)?)?(?:Z|[+-]\d{2}[:]\d{2})?)?)\s*'
+    timestamp_regex = r'^\s*\[?\s*(\d{4}[-/.]\d{2}[-/.]\d{2}(?:[ T]\d{2}[:]\d{2}(?:[:]\d{2}(?:[.,]\d+)?)?(?:Z|[+-]\d{2}[:]\d{2})?)?)\s*\]?\s*'
     timestamp_pattern = re.compile(timestamp_regex, re.MULTILINE)