Extend flake8 and address some issues

Makefile

@@ -36,12 +36,7 @@ dev-test:
 
 .PHONY: flake8
 flake8:
-	flake8 breathe/*.py \
-		breathe/directives/*.py \
-		breathe/finder/*.py \
-		breathe/renderer/sphinxrenderer.py \
-		breathe/renderer/filter.py \
-		breathe/parser/compound.py
+	flake8 breathe
 
 .PHONY: black
 black:

breathe/parser/__init__.py

@@ -94,4 +94,4 @@ def create_index_parser(self) -> DoxygenIndexParser:
         return DoxygenIndexParser(self.app, self.cache)
 
     def create_compound_parser(self, project_info: ProjectInfo) -> DoxygenCompoundParser:
-        return DoxygenCompoundParser(self.app, self.cache, project_info)
+        return DoxygenCompoundParser(self.app, self.cache, project_info)

breathe/parser/index.py

@@ -5,9 +5,9 @@
 from xml.dom import minidom
 from xml.parsers.expat import ExpatError
 
-
 from . import indexsuper as supermod
 
+
 class DoxygenTypeSub(supermod.DoxygenType):
 
     node_type = "doxygen"
@@ -41,9 +41,11 @@ def __init__(self, kind=None, refid=None, name=''):
 class ParseError(Exception):
     pass
 
+
 class FileIOError(Exception):
     pass
 
+
 def parse(inFilename):
     try:
         doc = minidom.parse(inFilename)

breathe/renderer/__init__.py

@@ -1,6 +1,3 @@
-from breathe.renderer.filter import Filter
-from breathe.renderer.target import TargetHandler
-
 from docutils import nodes
 import textwrap
 

setup.cfg

@@ -3,8 +3,10 @@ license_file = LICENSE
 
 [flake8]
 max-line-length = 100
-exclude=compoundsuper.py,indexsuper.py
+exclude = compoundsuper.py,indexsuper.py
 extend-ignore = E203, E231
+per-file-ignores =
+    breathe/parser/index.py:E305
 
 [bdist_wheel]
 universal = 0