Update to crrect match spectation.

On the problem specification for this exercise, we should follow what is
defined. Matching the input error first in case both are invalid.

For All your base exercise, we need it's valid to return input or output error when both are provided.
This commit allows both to be returned from the tested function

exercises/practice/all-your-base/.meta/example.ex

@@ -5,14 +5,14 @@ defmodule AllYourBase do
   """
 
   @spec convert(list, integer, integer) :: {:ok, list} | {:error, String.t()}
-  def convert(_, _, output_base) when output_base < 2 do
-    {:error, "output base must be >= 2"}
-  end
-
   def convert(_, input_base, _) when input_base < 2 do
     {:error, "input base must be >= 2"}
   end
 
+  def convert(_, _, output_base) when output_base < 2 do
+    {:error, "output base must be >= 2"}
+  end
+
   def convert(digits, input_base, output_base) do
     if Enum.all?(digits, &(0 <= &1 && &1 < input_base)) do
       {:ok, do_convert(digits, input_base, output_base)}

exercises/practice/all-your-base/test/all_your_base_test.exs

@@ -104,6 +104,6 @@ defmodule AllYourBaseTest do
 
   @tag :pending
   test "convert both bases are negative" do
-    assert AllYourBase.convert([1], -2, -7) == {:error, "output base must be >= 2"}
+    assert AllYourBase.convert([1], -2, -7) == {:error, "input base must be >= 2"}
   end
 end