test: ensure tests pass with a None parse_exception_ignore_pattern

Refs: #55

Author: dambrosio

sphinxcontrib/doxylink/doxylink.py

@@ -134,7 +134,7 @@ def is_url(str_to_validate: str) -> bool:
 
 class SymbolMap:
     """A SymbolMap maps symbols to Entries."""
-    def __init__(self, xml_doc: ET.ElementTree, parse_exception_ignore_pattern: Union['re.Pattern', None]) -> None:
+    def __init__(self, xml_doc: ET.ElementTree, parse_exception_ignore_pattern: Union['re.Pattern', None] = None) -> None:
         entries = parse_tag_file(xml_doc, parse_exception_ignore_pattern)
 
         # Sort the entry list for use with bisect

tests/test_doxylink.py

@@ -90,7 +90,7 @@ def test_file_different(examples_tag_file, symbol1, symbol2):
 
 def test_parse_tag_file(examples_tag_file):
     tag_file = ET.parse(examples_tag_file)
-    mapping = doxylink.parse_tag_file(tag_file)
+    mapping = doxylink.parse_tag_file(tag_file, None)
 
     def has_entry(name):
         """