id-pass-through.patch

diff --git a/lib/earthquake/input.rb b/lib/earthquake/input.rb
index 870cefc..c91519c 100644
--- a/lib/earthquake/input.rb
+++ b/lib/earthquake/input.rb
@@ -141,6 +141,7 @@ module Earthquake
     end
 
     input_filter do |text|
+      next text if text.sub!(/\A: /, "")
       if text =~ %r|^(:\w+)|
         if target = command_aliases[$1]
           text = text.sub(%r|^:\w+|, target)