Merge pull request #268 from charliesome/ruby-2.4

Ruby 2.4

Author: jch

.travis.yml

@@ -15,6 +15,7 @@ gemfile:
   - gemfiles/rails_3.gemfile
 
 rvm:
+  - 2.4.0
   - 2.3.1
   - 2.2.5
   - 2.1
@@ -30,3 +31,7 @@ matrix:
       rvm: 2.1
     - gemfile: gemfiles/rails_5.gemfile
       rvm: 2.0
+    - gemfile: gemfiles/rails_4.gemfile
+      rvm: 2.4.0
+    - gemfile: gemfiles/rails_3.gemfile
+      rvm: 2.4.0

gemfiles/rails_5.gemfile.lock

@@ -58,11 +58,11 @@ GEM
     erubis (2.7.0)
     escape_utils (1.0.1)
     gemoji (2.1.0)
-    github-linguist (2.12.0)
+    github-linguist (2.12.1)
       charlock_holmes (~> 0.7.3)
       escape_utils (~> 1.0.1)
       mime-types (~> 1.19)
-      pygments.rb (~> 0.6.0)
+      pygments.rb (> 0.6.0)
     github-markdown (0.6.9)
     globalid (0.3.6)
       activesupport (>= 4.1.0)
@@ -75,15 +75,14 @@ GEM
     mime-types (1.25.1)
     mini_portile2 (2.1.0)
     minitest (5.9.0)
+    multi_json (1.12.1)
     nio4r (1.2.1)
     nokogiri (1.6.8)
       mini_portile2 (~> 2.1.0)
       pkg-config (~> 1.1.7)
     pkg-config (1.1.7)
-    posix-spawn (0.3.11)
-    pygments.rb (0.6.3)
-      posix-spawn (~> 0.3.6)
-      yajl-ruby (~> 1.2.0)
+    pygments.rb (1.1.1)
+      multi_json (>= 1.0.0)
     rack (2.0.1)
     rack-test (0.6.3)
       rack (>= 1.0)
@@ -128,7 +127,6 @@ GEM
     websocket-driver (0.6.4)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.2)
-    yajl-ruby (1.2.1)
 
 PLATFORMS
   ruby
@@ -150,4 +148,4 @@ DEPENDENCIES
   sanitize (~> 2.0)
 
 BUNDLED WITH
-   1.12.5
+   1.13.7

lib/html/pipeline/toc_filter.rb

@@ -36,7 +36,7 @@ def call
         headers = Hash.new(0)
         doc.css('h1, h2, h3, h4, h5, h6').each do |node|
           text = node.text
-          id = text.downcase
+          id = ascii_downcase(text)
           id.gsub!(PUNCTUATION_REGEXP, '') # remove punctuation
           id.gsub!(' ', '-') # replace spaces with dash
 
@@ -50,6 +50,16 @@ def call
         result[:toc] = %Q{<ul class="section-nav">\n#{result[:toc]}</ul>} unless result[:toc].empty?
         doc
       end
+
+      if RUBY_VERSION >= "2.4"
+        def ascii_downcase(str)
+          str.downcase(:ascii)
+        end
+      else
+        def ascii_downcase(str)
+          str.downcase
+        end
+      end
     end
   end
 end