- update to 1.10
- add YAML option (on by default)
- remove gratuitous word from option descriptions
- USE_PYTHON=concurrent instead of setting EXAMPLESDIR
- alphabetize USE_PYTHON
- discard pkg-message given all options are enabled by default
While here limit python version to 2.x, because it's dependencies
graphics/py-graphviz and math/py-matplotlib failed to configure
with python3.
PR: 204594
Submitted by: John W. O'Brien <john@saltant.com>
Approved by: dikshie@sfc.wide.ad.jp (maintainer)
2f9e0ad0c5