[librsvg] (22 commits) ...Merge branch '791-tspan-rtl' into 'master'

[Marge Bot <marge-bot src gnome org>]

Summary of changes:

  0d22c3a... Add a --testing option to rsvg-convert - doesn't restrict t
  130f98d... Remove obsolete comment
  e4dc9ba... Check my assumptions about a layout's extents for RTL text
  2cbf66e... Characterization tests for text_anchor_advance() so I don't
  d649068... Remove unnecessary clone
  de4b907... PositionedSpan::from_measured - compute the NormalizeParams
  1457287... PositionedChunk::from_measured - take the ViewParams instea
  3aa998c... DrawingCtx::create_pango_context - put this here, instead o
  ceb0c1a... Let the positioning function know whether the whole text bl
  7c8b132... Remove unused field
  10ddc0c... Inline PositionedSpan::from_measured into its only caller
  64be384... Compute all values for PositionedSpan before initializing i
  571dc31... Remove unused fields
  1ddb143... Test for writing_mode.is_horizontal everywhere rather than 
  7c4b607... Inline WritingMode::is_vertical in its only caller
  1f4d072... text_anchor_advance: take a horizontal flag, not the whole 
  d4420a7... text_anchor_offset - rename function and its parameters
  5bf6868... text_anchor_offset: handle the text direction based on the 
  75aae86... Rename variable
  d64936f... Rename variable
  2b33cb1... (#791): Handle text direction while laying out spans inside
  899ccd0... Merge branch '791-tspan-rtl' into 'master'