Merged for javadoc

Author: fluentfuture

dot-parse/src/main/java/com/google/common/labs/parse/Parser.java

@@ -71,7 +71,8 @@
  *
  * <p>WARNING: A poorly-written grammar with long common prefixes may incur expensive backtracking
  * overhead. And if you define recursive grammars using {@link #define define()} or {@link
- * Parser.Rule}, maliciously crafted input (think of 10K left parens) can cause StackOverflowError.
+ * Parser.Rule}, maliciously crafted input (think of 10K left parens when a pair of parentheses
+ * define a nested recursive grammar rule) can cause StackOverflowError.
  */
 public abstract class Parser<T> {
   /**