Fix use_in_file_templates! with jRuby on Windows

It's actually a workaround for a jRuby issue.

  http://jira.codehaus.org/browse/JRUBY-61

Signed-off-by: Simon Rozet <simon@rozet.name>

lib/sinatra/base.rb

@@ -689,13 +689,12 @@ def inline_templates=(file=nil)
 
         begin
           app, data =
-            ::IO.read(file).split(/^__END__$/, 2)
+            ::IO.read(file).gsub("\r\n", "\n").split(/^__END__$/, 2)
         rescue Errno::ENOENT
           app, data = nil
         end
 
         if data
-          data.gsub!(/\r\n/, "\n")
           lines = app.count("\n") + 1
           template = nil
           data.each_line do |line|