Merge pull request #626 from Jire/patch-3

Documentation fix: 'iff' becomes 'if and only if'

Author: David Saff

src/main/java/org/junit/Test.java

@@ -59,8 +59,8 @@ private None() {
     }
 
     /**
-     * Optionally specify <code>expected</code>, a Throwable, to cause a test method to succeed iff
-     * an exception of the specified class is thrown by the method.
+     * Optionally specify <code>expected</code>, a Throwable, to cause a test method to succeed if
+     * and only if an exception of the specified class is thrown by the method.
      */
     Class<? extends Throwable> expected() default None.class;