add mediawiki support

lib/gollum/page.rb

@@ -4,7 +4,7 @@ module Gollum
 
     Wiki.page_class = self
 
-    VALID_PAGE_RE = /^(.+)\.(md|mkdn?|mdown|markdown|textile|rdoc|org|creole|re?st(\.txt)?|asciidoc|pod)$/i
+    VALID_PAGE_RE = /^(.+)\.(md|mkdn?|mdown|markdown|textile|rdoc|org|creole|re?st(\.txt)?|asciidoc|pod|(media)?wiki)$/i
     FORMAT_NAMES = { :markdown  => "Markdown",
                      :textile   => "Textile",
                      :rdoc      => "RDoc",
@@ -12,6 +12,7 @@ module Gollum
                      :creole    => "Creole",
                      :rest      => "reStructuredText",
                      :asciidoc  => "AsciiDoc",
+                     :mediawiki => "MediaWiki",
                      :pod       => "Pod" }
 
     # Sets a Boolean determing whether this page is a historical version.
@@ -161,6 +162,8 @@ module Gollum
           :pod
         when /\.(\d)$/i
           :roff
+        when /\.(media)?wiki$/i
+          :mediawiki
         else
           nil
       end
@@ -252,6 +255,7 @@ module Gollum
         when :rest      then 'rest'
         when :asciidoc  then 'asciidoc'
         when :pod       then 'pod'
+        when :mediawiki then 'mediawiki'
       end
     end