Removed the old 'update' when clause and fixed a small spelling error.

Library/Homebrew/refresh_brew.rb

@@ -11,7 +11,7 @@ class RefreshBrew
   end
   
   # Performs an update of the homebrew source. Returns +true+ if a newer
-  # version was availble, +false+ if already up-to-date.
+  # version was available, +false+ if already up-to-date.
   def update_from_masterbrew!
     output = git_pull!
     output.split("\n").each do |line|

bin/brew

@@ -137,12 +137,6 @@ begin
       end
       prune
 
-    when 'up', 'update'
-      puts "You can't yet update :( But you can try:"
-      puts "    git pull"
-      puts "    brew rm foo"
-      puts "    brew install foo"
-
     when 'prune'
       prune