docs: import figure diagrams with inkscape 0.92
No changes to the content here. This simply accepts the default option ("This
file contains digital artwork for screen display") on the prompt when first
opened, which is trying to upgrade from 90DPI to 96DPI.
Martin von Zweigbergk <martinvonz@google.com> [Thu, 25 Apr 2019 15:14:21 -0700] rev 4613
messages: standardize on "working copy is now at" including "is"
It seemed that we mostly used "is", but `hg next` and `hg prune` could
print it without the "is".