Gradle: bump gradle to v8.13

Author: cagix

README.md

@@ -11,7 +11,7 @@ Java based homework assignments.
 
 It comes with batteries included:
 
--   [Gradle 8.6] preinstalled
+-   [Gradle 8.13] preinstalled
 -   Basic Gradle configuration:
     -   [JDK 21] based projects
     -   Default [Gradle Java project layout]
@@ -42,7 +42,7 @@ Allow actions*"). You need to allow at least the following actions: `actions/che
 
 This [work] by [Carsten Gips] and [contributors] is licensed under [MIT].
 
-  [Gradle 8.6]: https://docs.gradle.org/8.6/release-notes.html
+  [Gradle 8.13]: https://docs.gradle.org/8.13/release-notes.html
   [JDK 21]: https://jdk.java.net/21/
   [Gradle Java project layout]: https://docs.gradle.org/current/userguide/java_plugin.html#sec:java_project_layout
   [JUnit 5]: https://junit.org/junit5/

gradle/wrapper/gradle-wrapper.jar

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

gradle/wrapper/gradle-wrapper.properties

@@ -86,8 +86,7 @@ done
 # shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
 # Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
-APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
-' "$PWD" ) || exit
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
@@ -206,7 +205,7 @@ fi
 DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Collect all arguments for the java command:
-#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
 #     and any embedded shellness will be escaped.
 #   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
 #     treated as '${Hostname}' itself on the command line.