Fix JSON formatter hanging forever

Author: angelikatyborska

exercism_test_helper/lib/json_formatter.ex

@@ -235,12 +235,7 @@ defmodule JSONFormatter do
 
   # Colorize Utility Functions -- from ExUnit.CLIFormatter, but can't import d/t being private in source
 
-  defp colorize(escape, msg, config) when is_doc(msg) do
-    msg = Inspect.Algebra.format(msg, 2)
-    colorize(escape, msg, config)
-  end
-
-  defp colorize(escape, string, %{colors: colors}) do
+  defp colorize(escape, string, %{colors: colors}) when is_binary(string) do
     if colors[:enabled] do
       [escape, string, :reset]
       |> IO.ANSI.format_fragment(true)
@@ -250,6 +245,15 @@ defmodule JSONFormatter do
     end
   end
 
+  defp colorize(escape, msg, config) when is_doc(msg) do
+    msg =
+      msg
+      |> Inspect.Algebra.format(2)
+      |> IO.iodata_to_binary()
+
+    colorize(escape, msg, config)
+  end
+
   @doc """
   Helper function to get the full path of the generated report file.
   It can be passed 2 configurations via environment variable

exercism_test_helper/lib/meta/style.ex

@@ -2,7 +2,7 @@ defmodule Meta.Style do
   def format(ast) do
     ast
     |> Macro.to_string()
-    |> Code.format_string!([line_length: 120, force_do_end_blocks: true])
+    |> Code.format_string!(line_length: 120, force_do_end_blocks: true)
     |> IO.iodata_to_binary()
   end
 end