[enh] raise if I try to set a target to an exception node that doesn't have an exception
[mod] setattr except@target none
[mod] setattr except@delimiteur = ','
[mod] setattr except@delimiteur = 'as'
[enh] raise if I try to set a unexistant delimiteur to an exception node
[mod] update TODO
[mod] setattr call@value
[mod] update TODO list
[enh] setattr assert@value
[enh] setattr assert@message
[enh] setattr assert@message empty
[enh] setattr associative_parenthesist@value
[enh] setattr atom_trailers@value
[enh] setattr binary@value with protective mesures
[mod] update TODO
[mod] update TODO
[mod] clean MASTA TODO
[enh] setattr binary_operator@value with protective mesures
[enh] setattr binary_operator@first
[enh] setattr binary_operator@second