Re: doc-strings: T vs t

[Richard Stallman]

It is outright wrong to write `t' as "T", and we should fix
all such bugs.

It is also somewhat undesirable to start a doc string (or a sentence)
with "t".  The best solution is to start with some other word.  For a
predicate, the solution is to start with "Return t".  For a flag, a
good solution is to write "Non-nil" rather than "t", since in such cases
any non-nil value will be equivalent.

Would you like to fix all of these, in the trunk only?