Allow uppercase chars in username

lib/jekyll-mentions.rb

@@ -31,7 +31,11 @@ def mentionify(doc)
       def filter_with_mention(src)
         filters[src] ||= HTML::Pipeline.new([
           HTML::Pipeline::MentionFilter
-        ], { :base_url => src })
+        ], { :base_url => src , :username_pattern => mention_username_pattern })
+      end
+
+      def mention_username_pattern
+        Regexp.new(HTML::Pipeline::MentionFilter::UsernamePattern.source, Regexp::IGNORECASE)
       end
 
       # Public: Filters hash where the key is the mention base URL.

spec/fixtures/_docs/dont_touch_me.txt

@@ -1,4 +1,4 @@
 ---
 title: Don't Touch Me
 ---
-test @test test
+test @TestUser test

spec/fixtures/_docs/file.md

@@ -1,4 +1,4 @@
 ---
 ---
 
-test @test test
+test @TestUser test

spec/fixtures/_docs/with_liquid.md

@@ -2,4 +2,4 @@
 title: With Liquid
 ---
 
-test @test test <a href="{{ page.url }}">{{ page.path }}</a>
+test @TestUser test <a href="{{ page.url }}">{{ page.path }}</a>

spec/fixtures/_posts/2016-01-01-awesome-post.md

@@ -2,4 +2,4 @@
 title: I'm a post
 ---
 
-test @test test
+test @TestUser test

spec/fixtures/_posts/2016-03-08-code-block.md

@@ -3,8 +3,8 @@
 
 ```ruby
 def test_output
-  "test @test test"
+  "test @TestUser test"
 end
 ```
 
-test @test test
+test @TestUser test

spec/fixtures/index.md

@@ -3,4 +3,4 @@ layout: default
 title: I'm a page
 ---
 
-test @test test
+test @TestUser test

spec/fixtures/leave-liquid-alone.md

@@ -2,4 +2,4 @@
 title: don't mangle that liquid plz
 ---
 
-test @test test<a href="{{ test }}">test</a>
+test @TestUser test<a href="{{ test }}">test</a>

spec/fixtures/mentioned-markdown.md

@@ -2,5 +2,5 @@
 title: mention me but don't eff my markdown
 ---
 
-test @test test
+test @TestUser test
 > test

spec/fixtures/non-mentioned.md

@@ -2,5 +2,5 @@
 title: don't mention me bro
 ---
 
-test test test
+test TestUser test
 > test

spec/fixtures/test.json

@@ -2,4 +2,4 @@
 title: I'm a page
 ---
 
-test @test test
+test @TestUser test

spec/mentions_spec.rb

@@ -15,8 +15,8 @@
   let(:mentions)    { described_class }
   let(:default_src) { "https://github.com" }
   let(:site)        { Jekyll::Site.new(configs) }
-  let(:unrendered)  { "test @test test" }
-  let(:result)      { "test <a href=\"https://github.com/test\" class=\"user-mention\">@test</a> test" }
+  let(:unrendered)  { "test @TestUser test" }
+  let(:result)      { "test <a href=\"https://github.com/TestUser\" class=\"user-mention\">@TestUser</a> test" }
 
   let(:posts)        { site.posts.docs.sort.reverse }
   let(:basic_post)   { find_by_title(posts, "I'm a post") }
@@ -51,7 +51,7 @@ def para(content)
 
   it "doesn't replace mentions in a code block" do
     expect(complex_post.output).to include(
-      "<span class=\"s2\">\"test @test test\"</span>"
+      "<span class=\"s2\">\"test @TestUser test\"</span>"
     )
     expect(complex_post.output).to include(result)
   end