Clean up doc configuration slightly

Author: QuLogic

.flake8

@@ -85,7 +85,7 @@ per-file-ignores =
     lib/mpl_toolkits/tests/conftest.py: F401
     lib/pylab.py: F401, F403
 
-    doc/conf.py: E402, E501
+    doc/conf.py: E402
     tutorials/advanced/path_tutorial.py: E402
     tutorials/advanced/patheffects_guide.py: E402
     tutorials/advanced/transforms_tutorial.py: E402, E501

doc/conf.py

@@ -1,10 +1,12 @@
 # Matplotlib documentation build configuration file, created by
 # sphinx-quickstart on Fri May  2 12:33:25 2008.
 #
-# This file is execfile()d with the current directory set to its containing dir.
+# This file is execfile()d with the current directory set to its containing
+# dir.
 #
 # The contents of this file are pickled, so don't put values in the namespace
-# that aren't pickleable (module imports are okay, they're removed automatically).
+# that aren't pickleable (module imports are okay, they're removed
+# automatically).
 #
 # All configuration values have a default value; values that are commented out
 # serve to show the default value.
@@ -30,7 +32,8 @@
 
 # Parse year using SOURCE_DATE_EPOCH, falling back to current time.
 # https://reproducible-builds.org/specs/source-date-epoch/
-sourceyear = datetime.utcfromtimestamp(int(os.environ.get('SOURCE_DATE_EPOCH', time.time()))).year
+sourceyear = datetime.utcfromtimestamp(
+    int(os.environ.get('SOURCE_DATE_EPOCH', time.time()))).year
 
 # If your extensions are in another directory, add it here. If the directory
 # is relative to the documentation root, use os.path.abspath to make it
@@ -226,9 +229,11 @@ def _check_dependencies():
 }
 
 project = 'Matplotlib'
-copyright = ('2002 - 2012 John Hunter, Darren Dale, Eric Firing, '
-             'Michael Droettboom and the Matplotlib development '
-             f'team; 2012 - {sourceyear} The Matplotlib development team')
+copyright = (
+    '2002 - 2012 John Hunter, Darren Dale, Eric Firing, Michael Droettboom '
+    'and the Matplotlib development team; '
+    f'2012 - {sourceyear} The Matplotlib development team'
+)
 
 
 # The default replacements for |version| and |release|, also used in various
@@ -389,8 +394,10 @@ def _check_dependencies():
 # The paper size ('letter' or 'a4').
 latex_paper_size = 'letter'
 
-# Grouping the document tree into LaTeX files. List of tuples
-# (source start file, target name, title, author, document class [howto/manual]).
+# Grouping the document tree into LaTeX files.
+# List of tuples:
+#   (source start file, target name, title, author,
+#    document class [howto/manual])
 
 latex_documents = [
     ('contents', 'Matplotlib.tex', 'Matplotlib',
@@ -618,23 +625,19 @@ def linkcode_resolve(domain, info):
         except (OSError, TypeError):
             lineno = None
 
-        if lineno:
-            linespec = "#L%d-L%d" % (lineno, lineno + len(source) - 1)
-        else:
-            linespec = ""
+        linespec = (f"#L{lineno:d}-L{lineno + len(source) - 1:d}"
+                    if lineno else "")
 
         startdir = Path(matplotlib.__file__).parent.parent
         fn = os.path.relpath(fn, start=startdir).replace(os.path.sep, '/')
 
         if not fn.startswith(('matplotlib/', 'mpl_toolkits/')):
             return None
 
-        m = re.match(r'^.*post[0-9]+\+\w([a-z0-9]+).\w+$', matplotlib.__version__)
-        if m:
-            return "https://github.com/matplotlib/matplotlib/blob/%s/lib/%s%s" % (
-                    m.group(1), fn, linespec)
-        else:
-            return "https://github.com/matplotlib/matplotlib/blob/v%s/lib/%s%s" % (
-                    matplotlib.__version__, fn, linespec)
+        m = re.match(r'^.*post[0-9]+\+\w([a-z0-9]+).\w+$',
+                     matplotlib.__version__)
+        version = m.group(1) if m else f'v{matplotlib.__version__}'
+        return ("https://github.com/matplotlib/matplotlib/blob"
+                f"/{version}/lib/{fn}{linespec}")
 else:
     extensions.append('sphinx.ext.viewcode')