Fix dev user seed: multiple ID was used twice.
Use blob local instead of instance.
Disable / hide MR edit blob button if cannot edit.
Add tests for tree edit routes

Critical because of possible confusion between /:id/preview
and /:id for a path that ends in preview.
Add Markdown preview to more forms

Enable Markdown previews when creating and editing issues, merge
requests, and milestones, and when editing notes.
Use GET instead of POST for Markdown previews
Refactor Markdown preview tests

Create a new shared module for common issue/merge request behavior,
use `expect` syntax instead of `should`, and avoid `visible: false` in
the `have_css` matcher.
Fix Markdown preview tests

Update Spinach tests for Markdown previews for the new-ish tab UI that
replaced the old preview/edit toggle button.
Add new Markdown preview test

Add a test to make sure that Markdown previews are available when
editing an existing issue.
Fix long line in view
Fix houndci warnings
Fix more Markdown preview tests
Fix test assertions

Make sure we're asserting the correct thing when testing visible and
invisible DOM elements.
Remove unused has_gitlab_shell3? method
Better message for failed pushes because of git hooks

Conflicts:
	lib/gitlab/git_access.rb
	spec/lib/gitlab/git_access_spec.rb
revert using the extension of the blob to determine the syntax highlighting language

nohighlight functionality for a hardcoded set of filenames is kept
Increase md typography font size

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch 'increase-font-size' into 'master'

Increase font size

Increase markdown typography font size to 15px.

Affected:

* wiki
* issue/mr description
* md files
* comments

Fixes #1662

See merge request !1265
Improve dashboard page for mobile

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Fix header and project home ui for mobile

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>