Restrict hamlit version, remove coffeescript filters.

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 v 8.10.0 (unreleased)
-  - Replace HAML with Hamlit to make view rendering faster. !3666
+  - Replace Haml with Hamlit to make view rendering faster. !3666
   - Wrap code blocks on Activies and Todos page. !4783 (winniehell)
   - Fix MR-auto-close text added to description. !4836

Gemfile

@@ -76,7 +76,7 @@ gem 'rack-cors',    '~> 0.4.0', require: 'rack/cors'
 gem "kaminari", "~> 0.17.0"
 # HAML
-gem "hamlit"
+gem 'hamlit', '~> 2.5'
 # Files attachments
 gem "carrierwave", '~> 0.10.0'
@@ -344,6 +344,5 @@ gem 'oauth2', '~> 1.0.0'
 # Soft deletion
 gem "paranoia", "~> 2.0"
-
 # Health check
 gem 'health_check', '~> 1.5.1'

Gemfile.lock

@@ -874,7 +874,7 @@ DEPENDENCIES
   gon (~> 6.0.1)
   grape (~> 0.13.0)
   grape-entity (~> 0.4.2)
-  hamlit
+  hamlit (~> 2.5)
   health_check (~> 1.5.1)
   hipchat (~> 1.5.0)
   html-pipeline (~> 1.11.0)

config/initializers/hamlit.rb

@@ -13,3 +13,6 @@ ActionView::Template.register_template_handler(
   :haml,
   Hamlit::TemplateHandler.new,
 )
+
+Hamlit::Filters.remove_filter('coffee')
+Hamlit::Filters.remove_filter('coffeescript')

doc/development/gotchas.md

@@ -46,7 +46,7 @@ Rubocop](https://gitlab.com/gitlab-org/gitlab-ce/blob/8-4-stable/.rubocop.yml#L9
 Using the inline `:coffee` or `:coffeescript` Haml filters comes with a
 performance overhead.
-_**Note:** We've [removed these two filters](https://gitlab.com/gitlab-org/gitlab-ce/blob/8-5-stable/config/initializers/haml.rb)
+_**Note:** We've [removed these two filters](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/config/initializers/hamlit.rb)
 in an initializer._
 ### Further reading