[pango] (14 commits) ...Merge branch 'visible-things' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  fd009f0... Add a helper for parsing flags (*)
  3c1a325... Add an attribute for showing invisible chars (*)
  475324b... markup: Support the new attribute (*)
  01a97d5... tests: Print the show attribute (*)
  c32b99a... tests: The show attribute affects shaping (*)
  e690d24... layout: The show attribute affects shaping (*)
  283c2d9... layout: Use a show attribute (*)
  f0f37ad... layout: Make tab visible too (*)
  85e5f0c... layout: Don't zero the width of visible space (*)
  2b4e7c7... shape: Apply the show attribute (*)
  a1b3306... Add a utility function for ignorables (*)
  c7a2b41... cairo: Better hex boxes for ignorables (*)
  49cd1c0... cairo: Render visible space differently (*)
  997c734... Merge branch 'visible-things' into 'master'

(*) This commit already existed in another branch; no separate mail sent