unit tests fail on windows runners

[Javagedes]

Hello, unit tests fail on windows runners, specifically for the trailing whitespace tests. This occured for the recent changes made to fix issues with resolving symlinks. The Path call in _normalize_path retains whitespaces on Linux, but removes them on Windows.

A simple (but not elegant) fix I found was to re-apply the trailing whitespace on windows systems.

# At bottom of file
def _count_trailing_whitespace(text: str):
    count = 0
    for char in reversed(str(text)):
        if char.isspace():
            count += 1
        else:
            break
    return count

# In IgnoreRule
def match(self, abs_path):
    """Returns True or False if the path matches the rule."""
    matched = False
    if self.base_path:
        rel_path = str(_normalize_path(abs_path).relative_to(self.base_path))
    else:
        rel_path = str(_normalize_path(abs_path))
    
    # Path() strips trailing spaces on windows
    if sys.platform.startswith('win'):        
        rel_path += " " * _count_trailing_whitespace(abs_path)
    
    # Path() strips the trailing slash, so we need to preserve it
    # in case of directory-only negation
    if self.negation and isinstance(abs_path, str) and abs_path[-1] == '/':
        rel_path += '/'
    if rel_path.startswith('./'):
        rel_path = rel_path[2:]
    if re.search(self.regex, rel_path):
        matched = True
    return matched

[mherrmann]

Hello, as usual I'll be happy to accept a PR that fixes this problem.

[Javagedes]

Hello, as usual I'll be happy to accept a PR that fixes this problem.

Added #61