RFR (XS): 8081603: erroneous dot file generated from Nashorn --print-code

[Michael Haupt]

Dear all,

please review and sponsor this small fix.
Bug: https://bugs.openjdk.java.net/browse/JDK-8081603
Changeset: http://cr.openjdk.java.net/~mhaupt/8081603/webrev.00/

When using the --print-code option with an output directory, dot files would sometimes contain lines reporting on caught exceptions. These are supposed to be part of the labels on graph nodes. The string would however end with a hard line break, which does not comply with dot label string formatting rules. The fix emits a dot compliant line break.

Tested manually with dot.

Thanks,

Michael

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