How to track down a mystery autocompletion Every time I type

nvm install


it magically autocompletes to

nvm install 9.2.1 --reinstall-packages-from=9.2.0 --latest-npm


with a return at the end, which errors as I'm using node 10.12.0 these days.

It doesn't matter what app I type this into, terminal, text editor, or even the browser (it autocompleted above when I typed this).

I've never set up any such autocompletion rules, and this wasn't happening previously.  How could this happen and how do I stop it?

Running macOS 10.14 (Mojave)
Argh.  Found the culprit.  Dash was doing it.



Looks like it was me after all.  sigh.