It means he can edit LaTeX. Of course, JeanHeyd is very qualified, but being project editor for an ISO standard does not require this.

▲

steveklabnik 3 hours ago | parent [-]

I mean, you're closer to the committee than I am, but while that is true in a literal sense, I'd assume that you all would not let someone who knew how to edit LaTeX but not know anything about C hold that position.

	▲	uecker 29 minutes ago \| parent [-]
		Assuming we have some choice. Not many people volunteer their time to this work, which is quite a lot and not much fun. Companies also do not invest a lot of resources into C.