SEC-2871: Polish README.adoc

README.adoc

@@ -16,14 +16,14 @@ Extensive JavaDoc for the Spring Security code is also available in the http://d
 We recommend you visit http://docs.spring.io/spring-security/site/docs/current/reference/htmlsingle/[Spring Security Reference] and read the "Getting Started" page.
 
 == Building from Source
-Spring Security uses a http://gradle.org[Gradle]-based build system. 
+Spring Security uses a http://gradle.org[Gradle]-based build system.
 In the instructions below, http://vimeo.com/34436402[`./gradlew`] is invoked from the root of the source tree and serves as
 a cross-platform, self-contained bootstrap mechanism for the build.
 
 === Prerequisites
-http://help.github.com/set-up-git-redirect[Git] and the http://www.oracle.com/technetwork/java/javase/downloads[JDK8 build].
+http://help.github.com/set-up-git-redirect[Git] and the http://www.oracle.com/technetwork/java/javase/downloads[JDK7 build].
 
-Be sure that your `JAVA_HOME` environment variable points to the `jdk1.8.0` folder extracted from the JDK download.
+Be sure that your `JAVA_HOME` environment variable points to the `jdk1.7.0` folder extracted from the JDK download.
 
 === Check out sources
 [indent=0]
@@ -43,11 +43,11 @@ git clone git@github.com:spring-projects/spring-security.git
 ./gradlew build
 ----
 
-Discover more commands with `./gradlew tasks`. 
+Discover more commands with `./gradlew tasks`.
 See also the https://github.com/spring-projects/spring-framework/wiki/Gradle-build-and-release-FAQ[Gradle build and release FAQ].
 
 == Getting Support
-Check out the http://stackoverflow.com/questions/tagged/spring-security[Spring Security tags on Stack Overflow]. 
+Check out the http://stackoverflow.com/questions/tagged/spring-security[Spring Security tags on Stack Overflow].
 http://spring.io/services[Commercial support] is available too.
 
 == Contributing