topic: fix compatibility issues caused because of change in transaction API
In 36f08ae87ef687be53a59bd87376bcfbe4479205 in core mercurial, `_validator`
attribute to transaction class was removed and a dict was introduced. It added a
`addvalidator()` function to transaction class which can be used to register
multiple validator callbacks.
This updates the code to use `addvalidator()` when `_validator` attribute is not
present.
SPHINXBUILD ?= sphinx-build
all: tutorials/tutorial.rst tutorials/topic-tutorial.rst static/logo-evolve.ico
$(SPHINXBUILD) . ../html/
tutorials/tutorial.rst: tutorials/tutorial.t test2rst.py
python test2rst.py tutorials/
tutorials/topic-tutorial.rst: tutorials/topic-tutorial.t test2rst.py
python test2rst.py tutorials/
static/logo-evolve.ico: static/logo-evolve.svg
convert -resize 36x36 static/logo-evolve.svg static/logo-evolve.ico