buildscripts: avoid using (deprecated) space-assignment syntax

Author: stephengold

build.gradle

@@ -25,12 +25,12 @@ configurations.configureEach {
 
 tasks.register('checkstyle') {
     dependsOn ':nifty:checkstyleMain', ':tests:checkstyleMain', ':x:checkstyleMain'
-    description 'Checks the style of all Java sourcecode.'
+    description = 'Checks the style of all Java sourcecode.'
 }
 
 def mergedJavadocSubprojects = [ ":nifty", ":x" ]
 tasks.register('mergedJavadoc', Javadoc) {
-    description 'Creates Javadoc from all the projects.'
+    description = 'Creates Javadoc from all the projects.'
     destinationDir = new File(project.buildDir, 'merged-javadoc')
     title = 'All modules'
 

common.gradle

@@ -30,7 +30,7 @@ tasks.withType(JavaExec).configureEach { // Java runtime options:
     //args '--verbose' // to enable additional log output
     classpath sourceSets.main.runtimeClasspath
     dependsOn 'installDist'
-    enableAssertions true
+    enableAssertions = true
     //jvmArgs '-verbose:gc'
     //jvmArgs '-Xms512m', '-Xmx512m' // to enlarge the Java heap
     //jvmArgs '-XX:+UseG1GC', '-XX:MaxGCPauseMillis=10'

x/build.gradle

@@ -24,11 +24,11 @@ dependencies {
 
 tasks.register('install') {
     dependsOn 'publishMavenPublicationToMavenLocal'
-    description 'Installs Maven artifacts to the local repository.'
+    description = 'Installs Maven artifacts to the local repository.'
 }
 tasks.register('release') {
     dependsOn 'publishMavenPublicationToOSSRHRepository'
-    description 'Stages Maven artifacts to Sonatype OSSRH.'
+    description = 'Stages Maven artifacts to Sonatype OSSRH.'
 }
 
 jar {