Update CONTRIBUTING.adoc

Author: rstoyanchev

CONTRIBUTING.adoc

@@ -201,9 +201,9 @@ need to import the root `spring-boot` pom and the `spring-boot-samples` pom sepa
 
 
 === Importing into IntelliJ IDEA
-**Please, do this first!!!**
+**Please, do this first!**
 Go to `Preferences | Build, Execution, Deployment | Build Tools | Maven | Importing`
-and set `VM options for importer` to `-Xmx2g` to allocate sufficient memory for IDEA's
+and set `VM options for importer` to `-Xmx2g` to allocate sufficient memory for IntelliJ IDEA's
 Maven import process to parse the Spring Boot project structure. _Not doing so could
 mean the import fails silently, leaving the project setup incomplete._