Merge branch 'line_wrap_default' into 'master'

Enable line wrapping per default.

This MR enables line wrapping by default and removes the checkbox to toggle it.

Let's be honest, noone likes horizontal scrollbars.

/cc @dzaporozhets @DouweM As discussed yesterday. Please take a look. Did I miss something?
The change feels to easy 😄

See merge request !396

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 
 v 7.10.0 (unreleased)
+  - enable line wrapping per default and remove the checkbox to toggle it (Hannes Rosenögger)
   - Add a service to support external wikis (Hannes Rosenögger)
 
 v 7.9.0 (unreleased)

app/assets/javascripts/behaviors/toggle_diff_line_wrap_behavior.coffee

-$ ->
-  # Toggle line wrapping in diff.
-  #
-  # %div.diff-file
-  #   %input.js-toggle-diff-line-wrap
-  #   %td.line_content
-  #
-  $("body").on "click", ".js-toggle-diff-line-wrap", (e) ->
-    diffFile = $(@).closest(".diff-file")
-    if $(@).is(":checked")
-      diffFile.addClass("diff-wrap-lines")
-    else
-      diffFile.removeClass("diff-wrap-lines")
-

app/views/projects/diffs/_file.html.haml

@@ -22,11 +22,6 @@
 
       .diff-btn-group
         - if blob.text?
-          - unless params[:view] == 'parallel'
-            %label
-              = check_box_tag nil, 1, false, class: 'js-toggle-diff-line-wrap'
-              Wrap text
-           
           = link_to '#', class: 'js-toggle-diff-comments btn btn-sm' do
             %i.fa.fa-chevron-down
             Show/Hide comments
@@ -39,7 +34,7 @@
 
         = view_file_btn(@commit.id, diff_file, project)
 
-  .diff-content
+  .diff-content.diff-wrap-lines
     -# Skipp all non non-supported blobs
     - return unless blob.respond_to?('text?')
     - if blob.text?