sphinx.environment: PEP8 cleanup.

sphinx/environment.py

@@ -38,7 +38,7 @@ from sphinx import addnodes
 from sphinx.util import url_re, get_matching_docs, docname_join, split_into, \
     FilenameUniqDict
 from sphinx.util.nodes import clean_astext, make_refnode, WarningStream
-from sphinx.util.osutil import SEP, fs_encoding, find_catalog_files
+from sphinx.util.osutil import SEP, find_catalog_files
 from sphinx.util.matching import compile_matchers
 from sphinx.util.websupport import is_commentable
 from sphinx.errors import SphinxError, ExtensionError
@@ -52,7 +52,9 @@ from sphinx.transforms import DefaultSubstitutions, MoveModuleTargets, \
 orig_role_function = roles.role
 orig_directive_function = directives.directive
 
-class ElementLookupError(Exception): pass
+
+class ElementLookupError(Exception):
+    pass
 
 
 default_settings = {
@@ -1102,7 +1104,6 @@ class BuildEnvironment:
                                     stream=WarningStream(self._warnfunc))
         return doctree
 
-
     def get_and_resolve_doctree(self, docname, builder, doctree=None,
                                 prune_toctrees=True, includehidden=False):
         """Read the doctree from the pickle, resolve cross-references and
@@ -1117,7 +1118,8 @@ class BuildEnvironment:
         # now, resolve all toctree nodes
         for toctreenode in doctree.traverse(addnodes.toctree):
             result = self.resolve_toctree(docname, builder, toctreenode,
-                          prune=prune_toctrees, includehidden=includehidden)
+                                          prune=prune_toctrees,
+                                          includehidden=includehidden)
             if result is None:
                 toctreenode.replace_self([])
             else:
@@ -1622,6 +1624,7 @@ class BuildEnvironment:
     def collect_relations(self):
         relations = {}
         getinc = self.toctree_includes.get
+
         def collect(parents, parents_set, docname, previous, next):
             # circular relationship?
             if docname in parents_set: