Hello and thanks for this amazing project,

I have a use-case where I would want to include/insert (I checked that 
the behavior is the same) some content to (according to the specified 
'action' behavior) *several* elements matching the 'selector', but it 
seems like soupault only performs the inclusion on the first occurrence.
Is it an expected behavior? Those widgets do not have the 'select_all' 
option, that would intuitively solve the problem.

Best,
Lelio