Titles in code plugins can have slashes in them. Closes #892

plugins/backtick_code_block.rb

@@ -2,7 +2,7 @@ require './plugins/pygments_code'
 
 module BacktickCodeBlock
   include HighlightCode
-  AllOptions = /([^\s]+)\s+(.+?)(https?:\/\/\S+|\/\S+)\s*(.+)?/i
+  AllOptions = /([^\s]+)\s+(.+?)\s+(https?:\/\/\S+|\/\S+)\s*(.+)?/i
   LangCaption = /([^\s]+)\s*(.+)?/i
   def render_code_block(input)
     @options = nil

plugins/code_block.rb

@@ -49,8 +49,8 @@ module Jekyll
   class CodeBlock < Liquid::Block
     include HighlightCode
     include TemplateWrapper
-    CaptionUrlTitle = /(\S[\S\s]*)\s+(https?:\/\/)(\S+)\s+(.+)/i
-    CaptionUrl = /(\S[\S\s]*)\s+(https?:\/\/)(\S+)/i
+    CaptionUrlTitle = /(\S[\S\s]*)\s+(https?:\/\/\S+|\/\S+)\s*(.+)?/i
+    CaptionUrl = /(\S[\S\s]*)\s+(https?:\/\/\S+|\/\S+)/i
     Caption = /(\S[\S\s]*)/
     def initialize(tag_name, markup, tokens)
       @title = nil
@@ -63,10 +63,10 @@ module Jekyll
       end
       if markup =~ CaptionUrlTitle
         @file = $1
-        @caption = "<figcaption><span>#{$1}</span><a href='#{$2 + $3}'>#{$4}</a></figcaption>"
+        @caption = "<figcaption><span>#{$1}</span><a href='#{$2}'>#{$3}</a></figcaption>"
       elsif markup =~ CaptionUrl
         @file = $1
-        @caption = "<figcaption><span>#{$1}</span><a href='#{$2 + $3}'>link</a></figcaption>"
+        @caption = "<figcaption><span>#{$1}</span><a href='#{$2}'>link</a></figcaption>"
       elsif markup =~ Caption
         @file = $1
         @caption = "<figcaption><span>#{$1}</span></figcaption>\n"