Set up DoctestFormatter (#1440)

* Set up DoctestFormatter

* Run mix format

* Update DoctestFormatter

Author: angelikatyborska

.formatter.exs

@@ -1,4 +1,4 @@
 [
-  plugins: [MarkdownCodeBlockFormatter],
+  plugins: [MarkdownCodeBlockFormatter, DoctestFormatter],
   inputs: ["mix.exs", "{exercises,bin}/**/*.{ex,exs}", "{concepts,exercises,docs,reference}/**/*.md", "*.md"]
 ]

exercises/practice/accumulate/.meta/example.ex

@@ -7,10 +7,10 @@ defmodule Accumulate do
 
     ## Examples
 
-      iex> Accumulate.accumulate([], fn(x) -> x * 2 end)
+      iex> Accumulate.accumulate([], fn x -> x * 2 end)
       []
 
-      iex> Accumulate.accumulate([1, 2, 3], fn(x) -> x * 2 end)
+      iex> Accumulate.accumulate([1, 2, 3], fn x -> x * 2 end)
       [2, 4, 6]
 
   """

exercises/practice/accumulate/lib/accumulate.ex

@@ -7,10 +7,10 @@ defmodule Accumulate do
 
     ## Examples
 
-      iex> Accumulate.accumulate([], fn(x) -> x * 2 end)
+      iex> Accumulate.accumulate([], fn x -> x * 2 end)
       []
 
-      iex> Accumulate.accumulate([1, 2, 3], fn(x) -> x * 2 end)
+      iex> Accumulate.accumulate([1, 2, 3], fn x -> x * 2 end)
       [2, 4, 6]
 
   """

exercises/practice/flatten-array/.meta/example.ex

@@ -5,7 +5,7 @@ defmodule FlattenArray do
     ## Examples
 
       iex> FlattenArray.flatten([1, [2], 3, nil])
-      [1,2,3]
+      [1, 2, 3]
 
       iex> FlattenArray.flatten([nil, nil])
       []

exercises/practice/flatten-array/lib/flatten_array.ex

@@ -5,7 +5,7 @@ defmodule FlattenArray do
     ## Examples
 
       iex> FlattenArray.flatten([1, [2], 3, nil])
-      [1,2,3]
+      [1, 2, 3]
 
       iex> FlattenArray.flatten([nil, nil])
       []

mix.exs

@@ -25,7 +25,8 @@ defmodule ExercismTestRunner.Mixfile do
   defp deps do
     [
       {:dialyxir, "~> 1.3.0", runtime: false},
-      {:markdown_code_block_formatter, "~> 0.1.0", runtime: false}
+      {:markdown_code_block_formatter, "~> 0.1.0", runtime: false},
+      {:doctest_formatter, "~> 0.2.0", runtime: false}
     ]
   end
 end

mix.lock

@@ -1,5 +1,6 @@
 %{
   "dialyxir": {:hex, :dialyxir, "1.3.0", "fd1672f0922b7648ff9ce7b1b26fcf0ef56dda964a459892ad15f6b4410b5284", [:mix], [{:erlex, ">= 0.2.6", [hex: :erlex, repo: "hexpm", optional: false]}], "hexpm", "00b2a4bcd6aa8db9dcb0b38c1225b7277dca9bc370b6438715667071a304696f"},
+  "doctest_formatter": {:hex, :doctest_formatter, "0.2.0", "fe6198e8d81d833269314696b5bb55c0db0e16f609de53cdcafe1758f53ecf6c", [:mix], [], "hexpm", "34fb0da7cbb704d5caf477e77268fcf7ee9c87e13d94a04ea1865afb9e82e3f5"},
   "erlex": {:hex, :erlex, "0.2.6", "c7987d15e899c7a2f34f5420d2a2ea0d659682c06ac607572df55a43753aa12e", [:mix], [], "hexpm", "2ed2e25711feb44d52b17d2780eabf998452f6efda104877a3881c2f8c0c0c75"},
   "markdown_code_block_formatter": {:hex, :markdown_code_block_formatter, "0.1.0", "1eb35408f0ce2cbd40086fea5bbb2aebbb4805ffc2c967f9e54aa724fa4bd222", [:mix], [], "hexpm", "ce27a7c7497074c48941c1d74ab9c39a08db31f2875b867c6d5671d7d70682b0"},
 }