more fault tolerance

tools/regression-tests/get-quick-list.py

@@ -242,6 +242,7 @@ def get_examples_using_styles(regex, examples='examples'):
     for filename in Path(examples).rglob('in.*'):
         with open(filename) as f:
             for line in f:
+                if line:
                     matches = regex.match(line)
                     if matches:
                         inputs.append(filename)