Address some minor codenarc violations in the base plugin

Author: rtyler

base-plugin/src/main/groovy/com/github/jrubygradle/JRubyPlugin.groovy

@@ -46,7 +46,7 @@ class JRubyPlugin implements Plugin<Project> {
             group TASK_GROUP_NAME
             description 'Prepare the gems/jars from the `gem` dependencies, extracts the gems into jruby.installGemDir and sets up the jars in jruby.installGemDir/jars'
             dependencies project.configurations.gems
-            outputDir {project.jruby.gemInstallDir}
+            outputDir { project.jruby.gemInstallDir }
         }
 
         project.task('generateGradleRb', type: GenerateGradleRb) {

base-plugin/src/main/groovy/com/github/jrubygradle/internal/JRubyExecUtils.groovy

@@ -124,7 +124,7 @@ class JRubyExecUtils {
 
         cmdArgs.addAll(jrubyArgs)
 
-        if (useBinPath && script !=null) {
+        if (useBinPath && script != null) {
             if (script.isAbsolute() && (!script.exists())) {
                 throw new InvalidUserDataException("${script} does not exist")
             }