Fix the issues mentioned by the linter

Gemfile

@@ -66,14 +66,14 @@ group :test do
   gem 'capybara'
   gem 'faker'
   gem 'geckodriver-bin', '~> 0.28.0'
+  gem 'haml_lint', require: false
   gem 'rubocop'
   gem 'rubocop-minitest'
   gem 'rubocop-performance'
   gem 'rubocop-rails'
   gem 'selenium-webdriver'
   gem 'vcr'
   gem 'webmock'
-  gem 'haml_lint', require: false
 end
 
 group :development, :test do

app/views/layouts/_flash.html.haml

@@ -1,17 +1,21 @@
 - unless flash.blank?
-  #flash-messages.container
-    - %w(success error warn note notice info).each do |flash_type|
-      - if (flash[flash_type] && !flash[flash_type].empty?)
-        - flash_header = case flash_type.to_sym
-        - when :error then 'alert alert-danger'
-        - when :warn then 'alert alert-warning'
-        - when :success then 'alert alert-success'
-        - when :note then 'alert alert-light'
-        - when :info then 'alert alert-info'
-        - when :notice then 'alert alert-primary'
+  .container#flash-messages
+    - %w[success error warn note notice info].each do |flash_type|
+      - if flash[flash_type] && !flash[flash_type].empty?
+        :ruby
+          states = {
+            error: 'alert alert-danger',
+            warn: 'alert alert-warning',
+            success: 'alert alert-success',
+            note: 'alert alert-light',
+            info: 'alert alert-info',
+            notice: 'alert alert-primary'
+          }
+          flash_header = states[flash_type.to_sym]
 
-        - body = flash[flash_type].gsub(/\n/, '<br/>')
-        - body = sanitize body, :tags => %w(a b p ul li br u), :attributes => %w(href title)
+          body = flash[flash_type].gsub(/\n/, '<br/>')
+          body = sanitize body, tags: %w[a b p ul li br u],
+                          attributes: %w[href title]
 
       %div{ class: flash_header }
         %p

app/views/layouts/_footer.html.haml

@@ -4,7 +4,9 @@
       .footer-copyright
         © 2011–
         = Time.new.year
-        = _("openSUSE contributors")
+        = _('openSUSE contributors')
       .list-inline
-        = link_to _("Source Code"), "https://github.com/openSUSE/news-o-o", class: "list-inline-item"
-        = link_to _("License"), "https://github.com/openSUSE/news-o-o/blob/master/LICENSE", class: "list-inline-item"
+        - github_link = 'https://github.com/openSUSE/news-o-o'
+        = link_to _('Source Code'), github_link, class: 'list-inline-item'
+        = link_to _('License'), "#{github_link}/blob/master/LICENSE",
+                  class: 'list-inline-item'

app/views/layouts/_navbar.html.haml

@@ -1,31 +1,40 @@
 %nav.navbar.noprint.navbar-expand-md.sticky-top
-  - homepage = build_service == true ? "https://build.opensuse.org" : "/"
-  = link_to homepage, class: "navbar-brand" do
-    = image_tag "chameleon/logo/favicon.svg", class: "d-inline-block align-top", alt: "openSUSE", title: "openSUSE", width: "30", height: "30"
+  - homepage = build_service == true ? 'https://build.opensuse.org' : '/'
+  = link_to homepage, class: 'navbar-brand' do
+    = image_tag 'chameleon/logo/favicon.svg', class: 'd-inline-block align-top',
+                alt: 'openSUSE', title: 'openSUSE', width: '30', height: '30'
     .navbar-title
       - if build_service == true
-        = _("Build Service")
+        = _('Build Service')
       - else
-        = _("Software")
+        = _('Software')
 
-  %button.navbar-toggler{ type: "button", data: { toggle: "collapse", target: "#navbar-collapse" } }
-    = icon "navbar_toggle"
+  %button.navbar-toggler{ type: 'button', data: { toggle: 'collapse',
+                                                  target: '#navbar-collapse' } }
+    = icon 'navbar_toggle'
 
   .collapse.navbar-collapse#navbar-collapse
     %ul.nav.navbar-nav.mr-auto.flex-md-shrink-0
       - if build_service == true
         %li.nav-item
-          = link_to "Embed instructions", { controller: "download", action: "doc" }, class: "nav-link"
+          = link_to 'Embed instructions', { controller: 'download',
+                                            action: 'doc' }, class: 'nav-link'
       %li.nav-item.dropdown
-        = link_to "#", class: "nav-link dropdown-toggle", id: "locale-menu-link", role: "button", "data-toggle": "dropdown", "aria": { "haspopup": "true", "expanded": "false" } do
-          = icon "navbar_locale"
-          %span.selected-language= LANGUAGE_NAMES[@lang]
+        = link_to '#', class: 'nav-link dropdown-toggle',
+                  id: 'locale-menu-link', role: 'button',
+                  'data-toggle': 'dropdown', aria: { haspopup: 'true',
+                                                     expanded: 'false' } do
+          = icon 'navbar_locale'
+          %span.selected-language= LANGUAGE_NAMES[current_language]
           %span.caret
         .dropdown-menu.dropdown-menu-right
           - LANGUAGES.sort.each do |lang|
-            = link_to LANGUAGE_NAMES[lang], params.permit.merge(locale: lang), class: "dropdown-item" 
+            = link_to LANGUAGE_NAMES[lang], params.permit.merge(locale: lang),
+                      class: 'dropdown-item'
 
-  %button.navbar-toggler.megamenu-toggler{ type: "button", data: { toggle: "collapse", target: "#megamenu" } }
-    = icon "megamenu_toggle"
+  %button.navbar-toggler.megamenu-toggler{ type: 'button',
+                                           data: { toggle: 'collapse',
+                                                   target: '#megamenu' } }
+    = icon 'megamenu_toggle'
 
-#megamenu.megamenu.collapse
+.megamenu.collapse#megamenu

app/views/layouts/application.html.haml

@@ -1,30 +1,36 @@
 !!! 5
 %html
   %head{ lang: @lang }
-    %meta{ charset: "utf-8" }
-    %meta{ "http-equiv": "X-UA-Compatible", content: "IE=edge" }
-    %meta{ name: "viewport", content: "width=device-width, initial-scale=1" }
+    %meta{ charset: 'utf-8' }
+    %meta{ 'http-equiv': 'X-UA-Compatible', content: 'IE=edge' }
+    %meta{ name: 'viewport', content: 'width=device-width, initial-scale=1' }
     %title= @page_title || _('openSUSE Software')
-    %meta{ "http-equiv": "Content-Type", content: "text/html; charset=utf-8" }
-    %meta{ "http-equiv": "Content-Script-Type", content: "text/javascript" }
-    %meta{ "http-equiv": "Content-Style-Type", content: "text/css" }
+    %meta{ 'http-equiv': 'Content-Type', content: 'text/html; charset=utf-8' }
+    %meta{ 'http-equiv': 'Content-Script-Type', content: 'text/javascript' }
+    %meta{ 'http-equiv': 'Content-Style-Type', content: 'text/css' }
 
-    %link{ rel: "search", type: "application/opensearchdescription+xml", title: "openSUSE Software", href: "/search_software.xml" }
-    %link{ href: "https://software.opensuse.org/favicon.ico", rel: "shortcut icon" }
+    %link{ rel: 'search', type: 'application/opensearchdescription+xml',
+           title: 'openSUSE Software', href: '/search_software.xml' }
+    %link{ href: 'https://software.opensuse.org/favicon.ico',
+           rel: 'shortcut icon' }
 
-    = stylesheet_link_tag "application"
-    = javascript_include_tag "application"
+    = stylesheet_link_tag 'application'
+    = javascript_include_tag 'application'
   %body
-    = render partial: "layouts/navbar", locals: { hidesearchbox: @hide_search_box, build_service: @build_service }
+    = render partial: 'layouts/navbar',
+             locals: { hidesearchbox: @hide_search_box,
+                       build_service: @build_service,
+                       current_language: @lang }
 
     - unless flash.blank?
-      = render(partial: "layouts/flash", object: flash)
+      = render(partial: 'layouts/flash', object: flash)
 
-    %main#content.page-content.flex-fill
+    %main.page-content.flex-fill#content
       - unless @hide_search_box
-        = render partial: 'search/find_form', locals: { baseproject: @baseproject }
+        = render partial: 'search/find_form',
+                 locals: { baseproject: @baseproject }
 
-      #search_result_container
+      #search-result-container
         = yield
 
-    = render partial: "layouts/footer"
+    = render partial: 'layouts/footer'

app/views/layouts/application.iframe.haml

@@ -1,8 +1,8 @@
 !!! 5
 %html
   %head
-    = stylesheet_link_tag "application"
-    = javascript_include_tag "application"
+    = stylesheet_link_tag 'application'
+    = javascript_include_tag 'application'
 
   %body
     = yield