MNT: Make some long line exceptions explicit

There's only one or two lines that need this exception, so the entire
file doesn't need to be exempted.

Author: QuLogic

.flake8

@@ -31,12 +31,10 @@ exclude =
     .eggs
 
 per-file-ignores =
-    lib/matplotlib/_animation_data.py: E501
     lib/matplotlib/_cm.py: E122, E202, E203, E302
     lib/matplotlib/_mathtext.py: E221, E251
     lib/matplotlib/_mathtext_data.py: E122, E203, E261
     lib/matplotlib/backends/backend_template.py: F401
-    lib/matplotlib/font_manager.py: E501
     lib/matplotlib/mathtext.py: E221
     lib/matplotlib/pylab.py: F401, F403
     lib/matplotlib/pyplot.py: F811

lib/matplotlib/_animation_data.py

@@ -251,7 +251,7 @@
     }}, 0);
   }})()
 </script>
-"""
+"""  # noqa: E501
 
 
 INCLUDED_FRAMES = """

lib/matplotlib/font_manager.py

@@ -206,7 +206,7 @@ def win32FontDirectory():
       \\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders\Fonts
 
     If the key is not found, ``%WINDIR%\Fonts`` will be returned.
-    """
+    """  # noqa: E501
     import winreg
     try:
         with winreg.OpenKey(winreg.HKEY_CURRENT_USER, MSFolders) as user: