try gradle 8.0.1 again

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1907813 13f79535-47bb-0310-9956-ffa450edef68

build.gradle

@@ -157,7 +157,7 @@ subprojects {
 
     tasks.withType(JavaCompile) {
         options.encoding = 'UTF-8'
-        options.compilerArgs << '-Xlint:unchecked'
+        options.compilerArgs += '-Xlint:unchecked'
         options.deprecation = true
         options.incremental = true
     }

poi-ooxml-full/build.gradle

@@ -51,7 +51,7 @@ final List MAIN_MODULE_PATH = sourceSets.main.runtimeClasspath.findAll{ it.path
 compileJava {
     dependsOn 'generate_beans'
     options.fork = true
-    options.forkOptions.jvmArgs << '-Xmx2G'
+    options.forkOptions.jvmArgs += '-Xmx2G'
 }
 
 task compileJava9(type: JavaCompile) {

poi-ooxml-lite/build.gradle

@@ -83,7 +83,7 @@ task compileOoxmlLite(type: Copy) {
 compileJava {
     dependsOn 'compileOoxmlLite'
     options.fork = true
-    options.forkOptions.jvmArgs << '-Xmx2G'
+    options.forkOptions.jvmArgs += '-Xmx2G'
 }
 
 processResources.dependsOn 'compileOoxmlLite'

poi/build.gradle

@@ -175,7 +175,7 @@ test {
 
     doFirst {
         if (jdkVersion > 8) {
-            jvmArgs << [
+            jvmArgs += [
                 '--add-modules', MODULE_NAME,
                 '--module-path', '../build/dist/maven/poi-tests' + File.pathSeparator + files(MODULE_PATH).asPath,
             ]