   defmacro !arg
 
   @doc """
-  Return true if left is less than right.
-  As Erlang, Elixir can compare any term. Allowed in guard clauses.
+  Returns true if left is less than right.
+  Like Erlang, Elixir can compare any term. Allowed in guard clauses.
 
   ## Examples
 

  defmacro left and right

  @doc """
  Boolean xor. Arguments needs to necessarily be booleans.
  Allowed in guard clauses.

  ## Examples

  end

  @doc """
  Checks if the given structure is a record. It is basically
  a convenient macro that checks the structure is a tuple and
  the first element matches the given kind.

