Windows: Add CR to ignore list for multi-line check

[bryphe]

Issue: When using ppx_expect with Windows-style newlines (CRLF vs LF), the multi-line expectation fails with:

         ppx lib/Util.pp.ml (exit 1)
(cd _build/default && .ppx/ppx_expect+ppx_inline_test+ppxlib/ppx.exe --cookie "library-name=\"lib\"" -o lib/Util.pp.ml --impl lib/Util.ml -corrected-suffix .ppx-corrected -diff-cmd - -dump-ast)
File "lib/Util.ml", line 7, characters 13-26:
Error: Multi-line expectations must start with an empty line

Defect: The current code considers the CR (/r) a character, and fails the check.

Fix: Ignore the /r as we do for other whitespace.

We hit this in our Windows build of esy: esy/esy#499

Signed-off-by: Bryan Phelps [email protected]

[ghost]

Thanks, I imported the patch in our internal repository