test: A couple comments

Author: effigies

tests/test_bidsignore.py

@@ -107,6 +107,7 @@ def test_gitignore_battery(gitignore_test):
     """Test our implementation against a gitignore battery."""
     filetree = FileTree.read_from_filesystem(gitignore_test)
     ignore = Ignore.from_file(filetree.children['.gitignore'])
+    # Remove inverted patterns
     ignore.patterns = [patt for patt in ignore.patterns if not patt.startswith('!')]
 
     expected_failures = Ignore(
@@ -117,7 +118,7 @@ def test_gitignore_battery(gitignore_test):
             'foo*.html',
             '/log/foo.log',
             'findthis*',
-            # Nested gitignore swaps positive and negative patterns
+            # Nested gitignore swaps expectations for all files
             'git-sample-3/',
             # Inversions in nested gitignores
             'arch/foo/kernel/vmlinux*',