[Uint] `gt` and `lt` doc comment error.

[erik-3milabs]

I believe there is a minor mistake in the documentation of Uint's lt and gt functions.

Respectively, the two read:

• "/// Returns the truthy value if self <= rhs and the falsy value otherwise." and
• "/// Returns the truthy value if self >= rhs and the falsy value otherwise."

Given that these are lt and gt (and not leq and geq), these should be strict inequalities: the = should be removed in both cases.