Remove spaces between delimiter and data

Question

I have a csv file like this :

xxxxx  xxxxx   ,xxxxx  ,  xxxxx
yyyyy yy   ,yy     ,  yyy
....

I would like to remove the spaces between delimiter and the end of the data before it to have this :

xxxxx  xxxxx,xxxxx,xxxxx
yyyyy yy,yy,  yyy
....

How can I do that in a simple way ? with a tool maybe ?

Thank you

Answer 1

Finally, thank to Marc B, I have it but faster with notepad ++, ctrl + F, replace, (search Mode = regular expression).

Find : \s+,
replace : ,