Accept --all-warnings on mix test

Author: josevalim

lib/mix/lib/mix/tasks/compile.elixir.ex

@@ -56,7 +56,6 @@ defmodule Mix.Tasks.Compile.Elixir do
     * `--long-compilation-threshold N` - sets the "long compilation" threshold
       (in seconds) to `N` (see the docs for `Kernel.ParallelCompiler.compile/2`)
     * `--profile` - if set to `time`, outputs timing information of compilation steps
-    * `--all-warnings` - prints warnings even from files that do not need to be recompiled
     * `--tracer` - adds a compiler tracer in addition to any specified in the `mix.exs` file
 
   ## Configuration

lib/mix/lib/mix/tasks/compile.ex

@@ -46,6 +46,7 @@ defmodule Mix.Tasks.Compile do
 
   ## Command line options
 
+    * `--all-warnings` - prints warnings even from files that do not need to be recompiled
     * `--erl-config` - path to an Erlang term file that will be loaded as Mix config
     * `--force` - forces compilation
     * `--list` - lists all enabled compilers

lib/mix/lib/mix/tasks/test.ex

@@ -107,6 +107,8 @@ defmodule Mix.Tasks.Test do
 
   ## Command line options
 
+    * `--all-warnings` - prints warnings even from files that do not need to be recompiled
+
     * `--color` - enables color in the output
 
     * `--cover` - runs coverage tool. See "Coverage" section below
@@ -389,6 +391,7 @@ defmodule Mix.Tasks.Test do
   """
 
   @switches [
+    all_warnings: :boolean,
     force: :boolean,
     color: :boolean,
     cover: :boolean,