Re: textproc/py-m2r: Incompletely specified dependency

From: John Hein <jh-fbml_at_snkmail.com>
Date: Mon, 16 May 2022 14:59:13 UTC
Kubilay Kocak wrote at 10:22 +1000 on May 16, 2022:
  .
  .
 > This causes the following failure at build time for users with mistune 
 > installed, as the dependency is (incorrectly) satisfied by the installed 
 > mistune (2.x) version:
 > 
  .
  .
 > > AttributeError: module 'mistune' has no attribute 'BlockGrammar'
 > > *** Error code 1
 > 
 > Please set a correct <version-spec> for the mistune dependency:
 > 
 >    ${PYTHON_PKGNAMEPREFIX}mistune0<2:textproc/py-mistune0@${PY_FLAVOR}
 > 
 > This will cause mistune0 to be installed. The issue of conflicting ports 
 > is left as a separate exercise.

Installing mistune0 is not enough to fix the problem if the newer mistune
is also installed.

See https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263956