\h*any horizontal whitespace character, repeated any number of times
wwwthe literal text www (case sensitive) \.the literal . (4610 / 568 / 2E16)
\S+any non-whitespace character, repeated at least once
,the literal , (4410 / 548 / 2C16)
\h*any horizontal whitespace character, repeated any number of times
Negated Character Class[^\s@]+ +matches at least one character outside the set below:
\sany whitespace character
@the literal @ (6410 / 1008 / 4016)
@the literal @ (6410 / 1008 / 4016)
Negated Character Class[^\s@,]+ +matches at least one character outside the set below:
\sany whitespace character
@the literal @ (6410 / 1008 / 4016)
,the literal , (4410 / 548 / 2C16)