Fuzz input validators for spaces at end of lines

Author: Matistjati

problemtools/verifyproblem.py

@@ -975,6 +975,7 @@ def _build_junk_modifier(
     _build_junk_modifier(
         'spaces added where there already is whitespace', r'\s', lambda m: m.group(0) + ' ' * random.randint(1, 5)
     ),
+    _build_junk_modifier('spaces added to the end of a line', r'\n', lambda m: m.group(0) + ' ' * random.randint(1, 5)),
     _build_junk_modifier('newlines added where there already are newlines', '\n', lambda m: '\n' * random.randint(2, 5)),
     _build_junk_modifier('leading zeros added to integers', r'(^|[^.]\b)([0-9]+)\b', r'\g<1>0000000000\g<2>'),
     _build_junk_modifier('trailing zeros added to real number decimal portion', r'\.[0-9]+\b', r'\g<0>0000000000'),