CSV Grammer should have } as disallowed in buffer

The CSV Writer outputs stuff like :

v{s{#5052494d415259,#505249...4e3e}}

Which by the grammar should still have the }} being part of the buffer. If you add "}" as a disallowed character, then this is parsable.

Grammar is under CSV here : http://hadoop.apache.org/common/docs/current/api/org/apache/hadoop/record/package-summary.html