failing tests

[tmillr]

• Fix anything broken by VimResume, mainly :checktime on resume
• Fix failing tests

[tmillr]

Unsure what's going on for should automatically check file times on resume.

The test passes on my system, but fails in CI? Very strange. I'm on macOS, CI is Ubuntu.

In CI the test is writing the file and changing it, and the autocmd is likely triggering, but :checktime doesn't do anything, not even when invoked manually.

Some ideas and things to try:

• stat the file manually and compare the stat before and after changing the file
• maybe nvim is hung up on a prompt? although I did check the mode via nvim_get_mode() and it returned normal mode and non-blocking
• I checked the buf's filename, it is correct
• the buf has the old content after :checktime, it is not getting the new changes
• the buf is nomod after :checktime and the changes
• see if there's a way to inspect vim's stored timestamp
• maybe it's something specific to Linux stat call/struct (e.g. granularity of file size or something?), try larger changes maybe
• try running ci on different os than Ubuntu
• maybe there's a difference across os's in how file writes occur or affect stat info for pre-existing files?