Fix server error when editing a note to "+1" or "-1"
### Summary
If a user edits a comment with "+1" or "-1" in the beginning, the POST returns an Internal Server error. (issue #1151). This merge request resolves that error.
### Steps to reproduce
1. Comment on an issue with "Test comment".
2. Edit the issue.
3. Write "+1" and click "Save Comment".
### Expected behavior
The edited note should be saved and refreshed. Any previous upvotes/downvotes from the user should contain a strikethrough.
### Observed behavior
Internal Error
### Relevant logs
```
Started PUT "/avocode/avocode-manager/notes/4996" for 185.33.136.107 at 2015-02-28 17:11:53 +0100
Processing by Projects::NotesController#update as JS
Parameters: {"utf8"=>"✓", "authenticity_token"=>"*removed*", "note"=>{"note"=>"+1\r\n\r\nYes"}, "commit"=>"Save Comment", "project_id"=>"avocode/avocode-manager", "id"=>"4996"}
Completed 500 Internal Server Error in 86ms
ActionView::Template::Error (undefined method `each' for nil:NilClass):
28: %span.note-last-update
29: = note_timestamp(note)
30:
31: - if note.superceded?(@notes)
32: - if note.upvote?
33: %span.vote.upvote.label.label-gray.strikethrough
34: %i.fa.fa-thumbs-up
app/models/note.rb:495:in `superceded?'
app/views/projects/notes/_note.html.haml:31:in `_app_views_projects_notes__note_html_haml___812277000516355462_69988235638820'
app/controllers/projects/notes_controller.rb:71:in `note_to_html'
app/controllers/projects/notes_controller.rb:103:in `render_note_json'
app/controllers/projects/notes_controller.rb:39:in `block (2 levels) in update'
app/controllers/projects/notes_controller.rb:38:in `update'
```
### Fix
It turns out no tests were present for the "Edit Issue" functionality. I added spinach tests to exercise this and reproduced the error.
Most of the routes in `notes_controller.rb` appear to render all notes for the given discussion. `_form.html.haml` needs the full list of notes commented by the user to add strikethroughs for older upvotes/downvotes. However, only the `index` route appeared to obtain this information. The fix is to add a `before_filter` to obtain all the user's notes beforehand, except in the delete case where this information is not needed.
Things to watch: `NotesFinder` needs `target_type` and `target_id` to determine what to do. I'm not sure if there is a conscious effort to phase these keywords out in favor of `noteable_type` and `noteable_id`.
See merge request !360
Irker is a gateway which sends IRC messages on git updates. This new
service provides an interface to this gateway, integrated in Gitlab, for
each updates.
As per the guidelines, this commit adds the new feature in the
CHANGELOG, tests and documentation.
See http://www.catb.org/esr/irker/
Marin Jankovski
Dmitriy Zaporozhets
Stan Hu
Aorimn
Andrès Koetsier
Dmitriy Zaporozhets
Marin Jankovski
Douwe Maan
Valery Sizov
Vinnie Okada
Hannes RosenöggerandDouwe Maan
Valery Sizov
Jeremy
Steven ThonusandHannes Rosenögger