Coding style cleanup

Fix the following issues reported by pylint:

C0321: More than one statement on a single line
W0622: Redefining built-in 'name'
W0612: Unused variable 'name'
W0613: Unused argument 'name'
W0102: Dangerous default value 'value' as argument
W0105: String statement has no effect

Also fixed a few cases of inconsistent indentation.

Change-Id: Ie0db839e7c57d576cff12d8c055fe87030d00744

subcmds/init.py

@@ -213,8 +213,6 @@ to update the working directory files.
       sys.exit(1)
 
   def _Prompt(self, prompt, value):
-    mp = self.manifest.manifestProject
-
     sys.stdout.write('%-10s [%s]: ' % (prompt, value))
     a = sys.stdin.readline().strip()
     if a == '':
@@ -328,9 +326,9 @@ to update the working directory files.
     self._ConfigureDepth(opt)
 
     if self.manifest.IsMirror:
-      type = 'mirror '
+      init_type = 'mirror '
     else:
-      type = ''
+      init_type = ''
 
     print ''
-    print 'repo %sinitialized in %s' % (type, self.manifest.topdir)
+    print 'repo %sinitialized in %s' % (init_type, self.manifest.topdir)