Fix several issues identified by unit tests

from os import path, environ

from configparser import ConfigParser, NoOptionError

from configparser import ConfigParser, NoOptionError, NoSectionError

from .. import loaders, patterns, rules, walk, util

		home_config = environ.get('XDG_CONFIG_HOME', path.join(home, '.config'))

		# ancestor .gitignore files

		while target_path:

			target_path = path.dirname(target_path)

			self.load_from_dir(target_path)

		target_path_split = list(path.split(target_path))

		while target_path_split:

			self.load_from_dir(path.join(*target_path_split))

			del target_path_split[-1]

		# $GIT_DIR/info/exclude files

		excludes_file = path.join(git_dir, 'info/exclude')

		config.read(config_files)

		try:

			excludes_file = config.get('core', 'excludesfile')

		except NoOptionError:

		except (NoOptionError, NoSectionError):

			excludes_file = path.join(home_config, 'git/ignore')

		with util.ignore_if_missing():

			self.load_patterns('', excludes_file)

	def load_patterns(self, directory, filename):

		rule_list = []

		with open(path.join(self.project_root, directory, filename)) as f:

		fullpath = path.join(self.project_root, directory, filename)

		with open(fullpath) as f:

			for line in f:

				rule_opts = dict(with_path=True)

				pattern_opts = dict()

				pattern_opts = dict(double_asterix=True)

				line = line.strip()

				if line.endswith('\\'):