Change help heading on mix

Author: José Valim

lib/mix/lib/mix/tasks/help.ex

@@ -65,10 +65,10 @@ defmodule Mix.Tasks.Help do
 
     if ansi_docs?(opts) do
       opts = [width: width] ++ opts
-      IO.ANSI.Docs.print_heading("mix help #{task}", opts)
+      IO.ANSI.Docs.print_heading("mix #{task}", opts)
       IO.ANSI.Docs.print(doc, opts)
     else
-      IO.puts "# mix help #{task}\n"
+      IO.puts "# mix #{task}\n"
       IO.puts doc
     end
 

lib/mix/test/mix/tasks/help_test.exs

@@ -31,7 +31,7 @@ defmodule Mix.Tasks.HelpTest do
           Mix.Tasks.Help.run ["compile"]
         end
 
-      assert output =~ "# mix help compile"
+      assert output =~ "# mix compile"
       assert output =~ "## Command line options"
       assert output =~ ~r/^Location:/m
     end