Merge branch 'hotfix/ruby-21-broken-update' into 'master'

fix syntax error on 2.1 and rubocop on 2.2

Background:

Hashes `{:'key': 'value'}` are not valid in 2.1 but are recommended by Rubocop on 2.2. We only use those when we have a key such as `weird-key`, `weird.key`, etc... 

We could disable Rubocop but it wouldn't warn us about the recommended syntax since `Ruby 1.9`: `{key: 'value'}`, which is valid for `Ruby 1.9+`.

Workaround 1 could be disabling `Style/HashSyntax:` in `rubocop.yml`. 

Workaround 2 (tried in this MR) is to trick Rubocop using `.to_sym` which is effectively the same as adding the `:`. This would allow to keep the warning in place.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/12801

See merge request !2637

app/helpers/commits_helper.rb

@@ -152,7 +152,7 @@ module CommitsHelper
 
     options = {
       class: "commit-#{options[:source]}-link has_tooltip",
-      data: { 'original-title': sanitize(source_email) }
+      data: { 'original-title'.to_sym => sanitize(source_email) }
     }
 
     if user.nil?

app/helpers/projects_helper.rb

@@ -40,7 +40,7 @@ module ProjectsHelper
       link_to(author_html, user_path(author), class: "author_link").html_safe
     else
       title = opts[:title].sub(":name", sanitize(author.name))
-      link_to(author_html, user_path(author), class: "author_link has_tooltip", data: { 'original-title': title, container: 'body' } ).html_safe
+      link_to(author_html, user_path(author), class: "author_link has_tooltip", data: { 'original-title'.to_sym => title, container: 'body' } ).html_safe
     end
   end
 

spec/models/concerns/case_sensitivity_spec.rb

@@ -37,7 +37,7 @@ describe CaseSensitivity, models: true do
             with(%q{LOWER("foo"."bar") = LOWER(:value)}, value: 'bar').
             and_return(criteria)
 
-          expect(model.iwhere('foo.bar': 'bar')).to eq(criteria)
+          expect(model.iwhere('foo.bar'.to_sym => 'bar')).to eq(criteria)
         end
       end
 
@@ -87,8 +87,8 @@ describe CaseSensitivity, models: true do
             with(%q{LOWER("foo"."baz") = LOWER(:value)}, value: 'baz').
             and_return(final)
 
-          got = model.iwhere('foo.bar': 'bar',
-                             'foo.baz': 'baz')
+          got = model.iwhere('foo.bar'.to_sym => 'bar',
+                             'foo.baz'.to_sym => 'baz')
 
           expect(got).to eq(final)
         end
@@ -127,7 +127,7 @@ describe CaseSensitivity, models: true do
             with(%q{`foo`.`bar` = :value}, value: 'bar').
             and_return(criteria)
 
-          expect(model.iwhere('foo.bar': 'bar')).
+          expect(model.iwhere('foo.bar'.to_sym => 'bar')).
             to eq(criteria)
         end
       end
@@ -178,8 +178,8 @@ describe CaseSensitivity, models: true do
             with(%q{`foo`.`baz` = :value}, value: 'baz').
             and_return(final)
 
-          got = model.iwhere('foo.bar': 'bar',
-                             'foo.baz': 'baz')
+          got = model.iwhere('foo.bar'.to_sym => 'bar',
+                             'foo.baz'.to_sym => 'baz')
 
           expect(got).to eq(final)
         end