Conform to flake8

Author: alexrudy

lib/matplotlib/__init__.py

@@ -282,10 +282,13 @@ def wrapper():
 
 _ExecInfo = namedtuple("_ExecInfo", "executable version")
 
+
 class ExecutableUnavailableError(FileNotFoundError):
-    """Error raised when an executable that Matplotlib optionally depends on can't be found."""
+    """Error raised when an executable that Matplotlib optionally
+    depends on can't be found."""
     pass
 
+
 @functools.lru_cache()
 def _get_executable_info(name):
     """
@@ -357,7 +360,8 @@ def impl(args, regex, min_ver=None, ignore_exit_code=False):
                 return impl([e, "--version"], "(.*)", "9")
             except ExecutableUnavailableError:
                 pass
-        raise ExecutableUnavailableError("Failed to find a Ghostscript installation")
+        message = "Failed to find a Ghostscript installation"
+        raise ExecutableUnavailableError(message)
     elif name == "inkscape":
         return impl(["inkscape", "-V"], "^Inkscape ([^ ]*)")
     elif name == "magick":

lib/matplotlib/animation.py

@@ -725,7 +725,8 @@ def bin_path(cls):
     def isAvailable(cls):
         try:
             return super().isAvailable()
-        except mpl.ExecutableUnavailableError:  # May be raised by get_executable_info.
+        except mpl.ExecutableUnavailableError:
+            # May be raised by get_executable_info.
             return False