+repeats the group contents below at least once:
\wany word character
?matches at most one character from the set below:
.the literal . (4610 / 568 / 2E16)
-the literal - (4510 / 558 / 2D16)
\@the literal @ (6410 / 1008 / 4016)
\w+any word character, repeated at least once
\.the literal . (4610 / 568 / 2E16)
\w+any word character, repeated at least once
g modifier: global. Finds all matches instead of stopping after the first