Escaped trailing space in .gitignore causes dangling \ error (differs from git)

Hi, I think there's a small mismatch with how git handles escaped trailing spaces in .gitignore.

Repro

Put this in your .gitignore:

$ printf 'foo\\   \n' > .gitignore
$ od -c .gitignore
0000000   f   o   o   \              \n

(that's foo, then a backslash, then three spaces. I'm using printf/od here because trailing spaces are invisible in a code block)

Now check a file with a trailing space:

$ git check-ignore -v 'foo '
.gitignore:1:foo\       foo

Git accepts this and ignores foo correctly.

But ripgrep throws an error:

$ rg hi
rg: ./.gitignore: line 1: error parsing glob 'foo\': dangling '\'

What's going on

From what I can tell, git trims normal trailing spaces but keeps the escaped one. So this pattern ends up matching foo .

In ripgrep, the trailing spaces seem to get trimmed a bit too aggressively. In this case, it removes the escaped space as well, leaving foo\, which then becomes a dangling backslash and causes a parse error.

Expected

It would be nice if this behaved like git:

• no parse error
• pattern matches foo

Notes

This feels similar to #2236, where a technically valid but uncommon pattern caused a dangling \ error and was fixed.

Totally understand if this is considered too edge-casey, but since git accepts it, thought it might be worth flagging.