README.md in gem-eit-0.5.1 vs README.md in gem-eit-0.6.0

@@ -23,17 +23,19 @@
 
 ## REQUIREMENTS:
 
 * Tested with MRI (official CRuby) 1.9.3, 2.0.0, Rubinius and JRuby.
 * [gem-path](https://github.com/godfat/gem-path)
+* `vim` from shell, or set `$GEM_EDITOR` or `$EDITOR` to the editor you want.
 
 ## INSTALLATION:
 
     gem install gem-eit
 
 ## SYNOPSIS:
 
-Please set either `$EIT_EDITOR` or `$EDITOR`.
+Please set either `$GEM_EDITOR` or `$EDITOR` to the editor you want.
+By default it would pick `vim` if nothing is set.
 
 ### Edit gem
 
     gem eit rib           # $EDITOR ~/.gem/ruby/2.0.0/gems/rib-1.0.0