252: Improve 'introduce variable' r=matklad a=flodiebold
- make it possible to extract a prefix of an expression statement (e.g.
`<|>foo.bar()<|>.baz()`)
- don't turn the last expression in a block into a let statement
- also fix a few typos
Co-authored-by: Florian Diebold <flodiebold@gmail.com>
0bdf8deb77