Error with single backslash at end of line

[pdmosses]

Describe the bug:
(Copying from a fixed pandoc issue:)

In LaTeX you can use a backslash \ followed by any whitespace to produce a regular space, as opposed to an inter-sentence space. The whitespace needn't be a space; it could be a line break.

KaTeX treats a single \ at the end of the line as an error.

To Reproduce:
Steps to reproduce the behavior:

1. Go to https://katex.org
2. Type a single \ followed immediately by a line break.
3. See KaTeX parse error: Undefined control sequence: \ at position 1: \̲ ̲.

Expected behavior:
It should produce a regular space instead of a parse error.

Screenshots:

Environment:

• KaTeX Version: 0.13.0

Additional context:
MathJax allows a single backslash at the end of the line.

[pdmosses]

The missing control sequence can be defined as equivalent to \ :

'\\\n': '\\ ',

A backslash followed by a tab character also gives a parse error, and could presumably be defined as a macro too...

However, line breaks and tabs should be equivalent to spaces not only in source text, but also in macro definitions. Perhaps \n and \t should be prohibited in macro names?

[KaTeX-bot]

🎉 This issue has been resolved in version 0.13.6 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀