Update spotless to 7.0.1 and fix style issues (#126)

build.gradle

@@ -4,7 +4,7 @@ buildscript {
       // Code formatting; defines targets "spotlessApply" and "spotlessCheck".
       // https://github.com/diffplug/spotless/tags ; see tags starting "gradle/"
       // Only works on JDK 11+.
-      classpath 'com.diffplug.spotless:spotless-plugin-gradle:6.25.0'
+      classpath 'com.diffplug.spotless:spotless-plugin-gradle:7.0.1'
     }
   }
 }
@@ -102,7 +102,6 @@ tasks.withType(JavaCompile).configureEach {
   // "-processing" avoids javac warning "No processor claimed any of these annotations".
   // "-Xlint:-options" is because of JDK 21 warning "source value 8 is obsolete..."
   options.compilerArgs << '-Xlint:all,-processing,-options' << '-Werror'
-  options.errorprone.enabled = isJava11orHigher
   options.errorprone {
     disable('ExtendsObject')  // Incorrect when using the Checker Framework
     disable('ReferenceEquality') // Use Interning Checker instead.

src/main/java/org/plumelib/bcelutil/StackMapUtils.java

@@ -649,9 +649,9 @@ protected final StackMapType generateStackMapTypeFromType(Type t) {
       case Const.T_OBJECT:
         return new StackMapType(
             Const.ITEM_Object, pool.addClass(typeToClassGetName(t)), pool.getConstantPool());
-        // UNKNOWN seems to be used for Uninitialized objects.
-        // The second argument to the constructor should be the code offset
-        // of the corresponding 'new' instruction.  Just using 0 for now.
+      // UNKNOWN seems to be used for Uninitialized objects.
+      // The second argument to the constructor should be the code offset
+      // of the corresponding 'new' instruction.  Just using 0 for now.
       case Const.T_UNKNOWN:
         return new StackMapType(Const.ITEM_NewObject, 0, pool.getConstantPool());
       default: