Improves CreateAppCommand: Use explicit assignment instead of "space-assignment"

Closes gh-865

Author: rainboyan

grace-shell/src/main/groovy/org/grails/cli/profile/commands/CreateAppCommand.groovy

@@ -909,7 +909,7 @@ class CreateAppCommand extends ArgumentCompletingCommand implements ProfileRepos
         }
         List<String> repositoryUrls = profile.repositories.sort().reverse()
         if (GrailsVersion.isGraceSnapshotVersion(grailsVersion)) {
-            repositoryUrls.add(0, 'maven { url "https://s01.oss.sonatype.org/content/repositories/snapshots/" }')
+            repositoryUrls.add(0, "maven { url = 'https://s01.oss.sonatype.org/content/repositories/snapshots/' }")
         }
         if (isSnapshotVersion) {
             repositoryUrls.add(0, 'mavenLocal()')
@@ -949,7 +949,7 @@ class CreateAppCommand extends ArgumentCompletingCommand implements ProfileRepos
         List<String> buildRepositoryUrls = buildRepositories.sort().reverse()
 
         if (GrailsVersion.isGraceSnapshotVersion(grailsVersion)) {
-            buildRepositoryUrls.add(0, 'maven { url "https://s01.oss.sonatype.org/content/repositories/snapshots/" }')
+            buildRepositoryUrls.add(0, "maven { url = 'https://s01.oss.sonatype.org/content/repositories/snapshots/' }")
         }
         if (isSnapshotVersion) {
             buildRepositoryUrls.add(0, 'mavenLocal()')
@@ -1038,26 +1038,26 @@ group """
                 replace(file: 'buildSrc/build.gradle') {
                     replacetoken 'mavenCentral()'
                     replacevalue '''mavenCentral()
-    maven { url 'https://repo.spring.io/milestone' }'''
+    maven { url = 'https://repo.spring.io/milestone' }'''
                 }
                 replace(file: 'build.gradle') {
                     replacetoken 'mavenCentral()'
                     replacevalue '''mavenCentral()
-    maven { url 'https://repo.spring.io/milestone' }'''
+    maven { url = 'https://repo.spring.io/milestone' }'''
                 }
             }
             else if (isSnapshotVersion) {
                 replace(file: 'buildSrc/build.gradle') {
                     replacetoken 'mavenCentral()'
                     replacevalue '''mavenCentral()
-    maven { url 'https://repo.spring.io/milestone' }
-    maven { url 'https://repo.spring.io/snapshot' }'''
+    maven { url = 'https://repo.spring.io/milestone' }
+    maven { url = 'https://repo.spring.io/snapshot' }'''
                 }
                 replace(file: 'build.gradle') {
                     replacetoken 'mavenCentral()'
                     replacevalue '''mavenCentral()
-    maven { url 'https://repo.spring.io/milestone' }
-    maven { url 'https://repo.spring.io/snapshot' }'''
+    maven { url = 'https://repo.spring.io/milestone' }
+    maven { url = 'https://repo.spring.io/snapshot' }'''
                 }
             }