Allow def test_... lines to be long

We currently allow lines like

    test "a really really ... really long test name" do

using the Active Support declarative test style to violate
`Layout/LineLength`. It stands to reason we should also allow the
equivalent Minitest style

    def test_a_really_really_..._really_long_test_name

Author: sambostock

rubocop.yml

@@ -66,6 +66,7 @@ Layout/LineEndStringConcatenationIndentation:
 Layout/LineLength:
   AllowedPatterns:
   - "\\A\\s*(remote_)?test(_\\w+)?\\s.*(do|->)(\\s|\\Z)"
+  - "\\A\\s*def test_\\w+\\s*\\Z"
 
 Layout/MultilineArrayLineBreaks:
   Enabled: true

test/fixtures/full_config.yml

@@ -717,6 +717,7 @@ Layout/LineLength:
   IgnoreCopDirectives: true
   AllowedPatterns:
   - "\\A\\s*(remote_)?test(_\\w+)?\\s.*(do|->)(\\s|\\Z)"
+  - "\\A\\s*def test_\\w+\\s*\\Z"
   IgnoredPatterns: []
 Layout/MultilineArrayBraceLayout:
   Description: Checks that the closing brace in an array literal is either on the