Wrong command name in mathtools: DeclarePairedDelimiters should be DeclarePairedDelimiter

[robly18]

The mathtools package in LaTeX has a command \DeclarePairedDelimiter. Mathjax reproduces it, but the name has an extra "s" at the end: \DeclarePairedDelimiters, as do the variations. For example, \DeclarePairedDelimitersX should instead be \DeclarePairedDelimiterX.

I have found no reason for this change, so as far as I know it is a typo. If it is on purpose, then perhaps a warning should be placed on the mathtools page.

[zorkow]

This is probably a typo. Even if \DeclarePairedDelimiters and \DeclarePairedDelimitersX were to remain, the singular version should be added.

[BlackHC]

And same for DeclarePairedDelimitersXPP -> DeclarePairedDelimiterXPP.

I just ran into the same issue and took me a few hours of debugging to figure out what is going on 🥲

Thanks so much!