Ignoring nonstandard backup files

[arensb]

treemacs--std-ignore-file-predicate has a long list of checks to determine whether a file should be ignored. One of them is to see whether it ends in ~, i.e., it's a backup file.

Emacs allows people to customize backup file names, and treemacs--std-ignore-file-predicate's test fails when someone uses a nonstandard extension like .bak for backup files. Thankfully, Emacs includes the backup-file-name-p function to test whether something is a backup filename. It's a simple matter of replacing (eq ?~ last) with (backup-file-name-p ,file).

[stale]

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