Fix some more invalid string escapes.

Author: QuLogic

examples/shapes_and_collections/path_patch.py

@@ -1,4 +1,4 @@
-"""
+r"""
 ================
 PathPatch object
 ================

lib/matplotlib/axes/_axes.py

@@ -5595,7 +5595,7 @@ def _pcolorargs(funcname, *args, **kw):
     @_preprocess_data(label_namer=None)
     @docstring.dedent_interpd
     def pcolor(self, *args, **kwargs):
-        """
+        r"""
         Create a pseudocolor plot with a non-regular rectangular grid.
 
         Call signature::

setupext.py

@@ -2051,7 +2051,7 @@ def check(self):
             output = check_output('latex -version', shell=True,
                                   stderr=subprocess.STDOUT)
             line = output.splitlines()[0].decode()
-            pattern = '(3\.1\d+)|(MiKTeX \d+.\d+)'
+            pattern = r'(3\.1\d+)|(MiKTeX \d+.\d+)'
             match = re.search(pattern, line)
             return "version %s" % match.group(0)
         except (IndexError, ValueError, AttributeError, subprocess.CalledProcessError):

versioneer.py

@@ -469,7 +469,7 @@ def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False):
             print("unable to run %s (error)" % dispcmd)
         return None
     return stdout
-LONG_VERSION_PY['git'] = '''
+LONG_VERSION_PY['git'] = r'''
 # This file helps to compute a version number in source trees obtained from
 # git-archive tarball (such as those provided by githubs download-from-tag
 # feature). Distribution tarballs (built by setup.py sdist) and build