[gobject-introspection] (31 commits) Non-fast-forward update to branch flake8

[Christoph Reiter <creiter src gnome org>]

The branch 'flake8' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  ce1ec93... tests: depend on flake8 instead of including pep8/pyflakes

Commits added to the branch:

  0aeaf6e... docwriter: Option to select output format (*)
  aad9d83... transformer: Strip whitespace from filter commands (*)
  c66bc40... docwriter: Add support for plural type references. (*)
  19c03a4... docwriter: parse markdown for code blocks. (*)
  7f67146... doctool: Output formatter for DevDocs (*)
  9719dd2... devdocs: Render a summary at the top of each page (*)
  c7014b8... docwriter: Use <pre> for code blocks (*)
  2635fb9... devdocs: Don't render private fields (*)
  89d6552... devdocs: Generate versioning notes (*)
  83a986e... devdocs: Add deprecated CSS class where needed (*)
  dbcc0f8... docwriter: Handle moved_to in underscore function (*)
  2656076... devdocs: Format the values of constants (*)
  b7ee86a... devdocs: Describe bare functions (*)
  9e31e06... devdocs: Match DevDocs' slug names (*)
  916c626... devdocs: Mark links to other GIRs as such (*)
  cd7b575... devdocs: Add extra CSS class to default.tmpl (*)
  88957d2... devdocs: Describe aliases more thoroughly (*)
  d1ca314... devdocs: Fix links to enum members (*)
  0a9b0d8... devdocs: Format in and out parameters correctly (*)
  d69aad5... devdocs: Mention when a function throws an error (*)
  9d0c3e1... devdocs: Distinguish between versioning notes (*)
  fc39530... docwriter: Handle invalid nodes better (*)
  13635f6... docwriter: Handle unknown language MIME types (*)
  78a238d... docwriter: Gdk.Atom as String (*)
  f0434e0... Convert FORMATS to tuple. (*)
  5e6266e... Only output introspectable methods. (*)
  c67fbbf... Sort index files by type. (*)
  c8eb3be... Improve markdown compatibility of docwriter. (*)
  48d348a... Fix format/format_inline distinction. - Fix autopep8 errors (*)
  f2be65b... Merge branch 'devdocs-format-rebase-v2' into 'master' (*)
  e830dc0... tests: depend on flake8 instead of including pep8/pyflakes

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