[ci skip] Better readability in .gitlab-ci.yml

.gitlab-ci.yml

@@ -4,11 +4,21 @@ include:
 variables:
   # This will suppress any download for dependencies and plugins or upload messages which would clutter the console log.
   # `showDateTime` will show the passed time in milliseconds. You need to specify `--batch-mode` to make this work.
-  MAVEN_OPTS: "-Dhttps.protocols=TLSv1.2 -Dmaven.repo.local=$CI_PROJECT_DIR/.m2/repository -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=WARN -Dorg.slf4j.simpleLogger.showDateTime=true -Djava.awt.headless=true"
+  MAVEN_OPTS: >-
+    -Dhttps.protocols=TLSv1.2
+    -Dmaven.repo.local=$CI_PROJECT_DIR/.m2/repository
+    -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=WARN
+    -Dorg.slf4j.simpleLogger.showDateTime=true -Djava.awt.headless=true
   # As of Maven 3.3.0 instead of this you may define these options in `.mvn/maven.config` so the same config is used
   # when running from the command line.
   # `installAtEnd` and `deployAtEnd` are only effective with recent version of the corresponding plugins.
-  MAVEN_CLI_OPTS: "--batch-mode --errors --fail-at-end --show-version -DinstallAtEnd=true -DdeployAtEnd=true"
+  MAVEN_CLI_OPTS: >-
+    --batch-mode
+    --errors
+    --fail-at-end
+    --show-version
+    -DinstallAtEnd=true
+    -DdeployAtEnd=true
 
 # Cache downloaded dependencies and plugins between builds.
 # To keep cache across branches add 'key: "$CI_JOB_NAME"'