match: join two nested if-blocks

Instead of

  if a:
      if b:
          return False

let's write it

  if a and b:
      return False

mercurial/match.py

@@ -226,10 +226,10 b' class match(object):'
             return False
         if (self._includeroots and
             dir not in self._includeroots and
-            dir not in self._includedirs):
-            if not any(parent in self._includeroots
-                       for parent in util.finddirs(dir)):
-                return False
+            dir not in self._includedirs and
+            not any(parent in self._includeroots
+                    for parent in util.finddirs(dir))):
+            return False
         return (not self._fileroots or
                 '.' in self._fileroots or
                 dir in self._fileroots or