Merge pull request #936 from Vlatombe/buildvariablecontributor-copypaste-error

Fixing copy-paste error

core/src/main/java/hudson/model/BuildVariableContributor.java

@@ -67,7 +67,7 @@ public abstract class BuildVariableContributor implements ExtensionPoint {
     public abstract void buildVariablesFor(AbstractBuild build, Map<String,String> variables);
 
     /**
-     * Returns all the registered {@link EnvironmentContributor}s.
+     * Returns all the registered {@link BuildVariableContributor}s.
      */
     public static ExtensionList<BuildVariableContributor> all() {
         return Jenkins.getInstance().getExtensionList(BuildVariableContributor.class);