match: minor cleanups to patternmatcher and includematcher

The "patterns"/"include" in "patternspat"/"includepat" is redundant,
so drop it. Also a "_" prefix since it's "private".

Inline the "pm"/"im" variables.

mercurial/match.py

@@ -358,9 +358,8 b' class patternmatcher(basematcher):'
 
         self._files = _explicitfiles(kindpats)
         self._anypats = _anypats(kindpats)
-        self.patternspat, pm = _buildmatch(ctx, kindpats, '$', listsubrepos,
+        self._pats, self.matchfn = _buildmatch(ctx, kindpats, '$', listsubrepos,
                                            root)
-        self.matchfn = pm
 
     @propertycache
     def _dirs(self):
@@ -379,7 +378,7 b' class patternmatcher(basematcher):'
         return self._anypats
 
     def __repr__(self):
-        return ('<patternmatcher patterns=%r>' % self.patternspat)
+        return ('<patternmatcher patterns=%r>' % self._pats)
 
 class includematcher(basematcher):
 
@@ -387,7 +386,7 b' class includematcher(basematcher):'
                  badfn=None):
         super(includematcher, self).__init__(root, cwd, badfn)
 
-        self.includepat, im = _buildmatch(ctx, kindpats, '(?:/|$)',
+        self._pats, self.matchfn = _buildmatch(ctx, kindpats, '(?:/|$)',
                                           listsubrepos, root)
         self._anypats = _anypats(kindpats)
         roots, dirs = _rootsanddirs(kindpats)
@@ -395,7 +394,6 b' class includematcher(basematcher):'
         self._roots = set(roots)
         # dirs are directories which are non-recursively included.
         self._dirs = set(dirs)
-        self.matchfn = im
 
     def visitdir(self, dir):
         if not self._anypats and dir in self._roots:
@@ -411,7 +409,7 b' class includematcher(basematcher):'
         return True
 
     def __repr__(self):
-        return ('<includematcher includes=%r>' % self.includepat)
+        return ('<includematcher includes=%r>' % self._pats)
 
 class exactmatcher(basematcher):
     '''Matches the input files exactly. They are interpreted as paths, not