Text ending in a full stop, exclamation mark or question mark

Text ending in a full stop, exclamation mark or question mark
should not flag the end of a sentence if:

1) The punctuation is followed by closing delimiters
and not preceded by alphanumeric characters, like in
"There is no full stop (.) in this sentence"

or

2) The punctuation is a child of a macro
and not preceded by alphanumeric characters, like in
"There is no full stop
.Pq \&.
in this sentence"

jmc@ and sobrado@ like this