Blocked revisions 86794,86797,86800 via svnmerge

........
  r86794 | georg.brandl | 2010-11-26 12:50:13 +0100 (Fr, 26 Nov 2010) | 1 line

  #10526: fix typo.
........
  r86797 | georg.brandl | 2010-11-26 13:05:27 +0100 (Fr, 26 Nov 2010) | 1 line

  Modernize code in effective().
........
  r86800 | georg.brandl | 2010-11-26 13:10:06 +0100 (Fr, 26 Nov 2010) | 1 line

  Typo fix.
........