I'm trying to get autocorrect to change ,, (two commas) into one comma whenever it detects them. It will only do this if I am actually typing the commas, not if I insert something that has a comma already attached to it. Here is an example of what I am trying to do:

#existing sentence
it is an aged,

#macro inserted text
, uh,

#current results
it is an aged,, uh,

#desired results
it is an aged, uh,

Is this something I would need to have a macro for or is there a setting maybe?