Escape the query argument provided to `git grep` by `search_files`

Closes #14963.

See merge request !3633

Fix datetime format when migrating new notification settings on MySQL

Closes #15264 

See merge request !3733

change "very demand" to "specific demand" in CI runner docs

[ci skip]

See merge request !3726

Copying and pasting doesn't grab line numbers or +/-

Fixes #14176 

See merge request !3687

Add Sentry program context even without a current user



See merge request !3729

Remove deprecated NGINX CI config

[ci skip]

See merge request !3728

Emoji categories fix

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/14020

See merge request !3727

Removed references to subscribe-button CSS class

These were being blocked by adblocks

Closes #15043

See merge request !3677

Auto git fsck

Closes https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/3232

See merge request !3232

Projects on group page should be sorted by last activity instead of id/created_at
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Fixes #15237 

See merge request !3716

This must be an error as the sentence doesn't make sense otherwise

Fix revoking of authorized OAuth applications

Users were not able to revoke access to authorized OAuth applications. Clicking the "Revoke" button would result in a 404 page, and the application would still be authorized.

Added a spec and also found that the `gon` variables were not being set for this view.

Closes #14370

See merge request !3690

Setup visibility level for project when transfering for a group

fixes #15155 

See merge request !3707

Use rake db:reset instead of db:setup

See merge request !3721

Closes #14370

Move gon function into its own helper

This fixes the authorized applications not being revoked properly at
`/profile/applications`.

Fixes #14370.

Add content attributes to discussion diffs; change styling of add-note icon to prevent white spaces in paste

Using db:reset ensures existing tables are first dropped. This in turn
ensures that we can drop tables regardless of any foreign key
constraints. While CE currently doesn't have any foreign keys EE defines
the following relation:

    remote_mirrors.project_id -> projects.id

MySQL will complain whenever you try to drop the "projects" table first
even when using "DROP TABLE ... CASCADE".

Start with iid on branch creation

After the discussion it in #3886 it was decided the iid should be in the beginning of the branch name.

See merge request !3708

Update shibboleth configuration for GitLab 8.6 and Apache 2.4



See merge request !3713

Add TOC to yaml README and an intro section



See merge request !3719

[ci skip]