Fix output for usage instructions in CLI by removing stderr redirection in Elixir starter files.

Author: andy1li

compiled_starters/elixir/lib/main.ex

@@ -15,7 +15,7 @@ defmodule CLI do
             # IO.puts("database page size: #{page_size}")
         end
       _ ->
-        IO.puts(:stderr, "Usage: your_program <database_file> <command>")
+        IO.puts("Usage: your_program <database_file> <command>")
     end
   end
 end

solutions/elixir/01-dr6/code/lib/main.ex

@@ -11,7 +11,7 @@ defmodule CLI do
             IO.puts("database page size: #{page_size}")
         end
       _ ->
-        IO.puts(:stderr, "Usage: your_program <database_file> <command>")
+        IO.puts("Usage: your_program <database_file> <command>")
     end
   end
 end

solutions/elixir/01-dr6/diff/lib/main.ex.diff

@@ -19,7 +19,7 @@
 +            IO.puts("database page size: #{page_size}")
          end
        _ ->
-         IO.puts(:stderr, "Usage: your_program <database_file> <command>")
+         IO.puts("Usage: your_program <database_file> <command>")
      end
    end
  end

starter_templates/elixir/code/lib/main.ex

@@ -15,7 +15,7 @@ defmodule CLI do
             # IO.puts("database page size: #{page_size}")
         end
       _ ->
-        IO.puts(:stderr, "Usage: your_program <database_file> <command>")
+        IO.puts("Usage: your_program <database_file> <command>")
     end
   end
 end