The blockdiag extension currently provides poor support for word
wrapping. While a PR has been filed, the project appears to be dormant
and it's likely going to be a while (if ever) before it gets merged. As
such, it's easier to carry our own, monkey patched version of the
plugin.
Change-Id: Iac2f8cadc688334e07ad46c5af1870b568c56e73
Co-Authored-By: Eric Fried <efried@us.ibm.com>
b7e2e4d3f7