There was already a content_for snippet on the eruby snippet file.

Tags for Rails views should go there and not on the Ruby snippet file.

snippets/eruby.snippets

@@ -34,9 +34,9 @@ snippet licai
 snippet yield
 	<%= yield${1::content_symbol}%>${2}
 snippet conf
-	<% content_for ${1::foo} do %>
+	<% content_for :${1:head} do %>
 		${2}
-	<% end -%>
+	<% end %>
 # Ruby ******************************
 snippet :
 	:${1:key} => ${2:"value"}${3}

snippets/ruby.snippets

@@ -554,8 +554,3 @@ snippet aft
 #debugging
 snippet debug
 	require 'ruby-debug'; debugger;
-#views
-snippet cfor
-	<% content_for :${1:head} do %>
-		${2}
-	<% end %>