Readability

.github/workflows/main.yml

@@ -15,14 +15,9 @@ jobs:
           POSTGRES_PASSWORD: postgres
     strategy:
       fail-fast: true
+
       matrix:
-        ruby_version:
-          - '3.1'
-          - '3.0'
-          - '2.7'
-          - '2.6'
-          - '2.5'
-          - 'jruby-9.3.2.0'
+        ruby_version: ['3.1', '3.0', '2.7', '2.6', '2.5', 'jruby-9.3.2.0']
         gemfile:
           - gemfiles/active_record_70.gemfile
           - gemfiles/active_record_61.gemfile
@@ -31,10 +26,8 @@ jobs:
           - gemfiles/active_record_51.gemfile
           - gemfiles/active_record_50.gemfile
           - gemfiles/active_record_edge.gemfile
-        db:
-          - sqlite3
-          - postgresql
-          - mysql
+        db: ['sqlite3', 'postgresql', 'mysql']
+
         exclude:
           - ruby_version: '3.1'
             gemfile: gemfiles/active_record_60.gemfile
@@ -66,6 +59,7 @@ jobs:
             gemfile: gemfiles/active_record_70.gemfile
           - ruby_version: 'jruby-9.3.2.0'
             gemfile: gemfiles/active_record_edge.gemfile
+
         include:
           - ruby_version: 'ruby-head'
             gemfile: gemfiles/active_record_edge.gemfile
@@ -76,9 +70,11 @@ jobs:
           - ruby_version: 'ruby-head'
             gemfile: gemfiles/active_record_edge.gemfile
             db: mysql
+
           - ruby_version: '2.4'
             gemfile: gemfiles/active_record_52.gemfile
             db: sqlite3
+
           - ruby_version: '2.3'
             gemfile: gemfiles/active_record_52.gemfile
             db: sqlite3
@@ -88,18 +84,23 @@ jobs:
           - ruby_version: '2.3'
             gemfile: gemfiles/active_record_41.gemfile
             db: sqlite3
+
           - ruby_version: '2.2'
             gemfile: gemfiles/active_record_52.gemfile
             db: sqlite3
+
           - ruby_version: '2.1'
             gemfile: gemfiles/active_record_42.gemfile
             db: sqlite3
-    runs-on: ubuntu-18.04
+
     env:
       BUNDLE_GEMFILE: ${{ matrix.gemfile }}
       DB: ${{ matrix.db }}
       POSTGRES_PASSWORD: postgres  # for passing the password to the Rails process
       MYSQL_PASSWORD: root  # for passing the password to the Rails process
+
+    runs-on: ubuntu-18.04
+
     steps:
       - uses: actions/checkout@v2
       - name: Install libmysqld-dev