Part of Key signature in bracket

[Andreas Stenberg]

Hi!

I'm editing an 18-th century piece with several voices and "movements" 
where the source; an early print, has a printing error for the first 
movement of the pice. In all the Voices for that movement the key is 
given as G-major when it obviously should be D- major as in the rest of 
the movements. Is there any way to get a bracket on the c- sharp in the 
key signature for D - major?
(I'v allready found the snippet for putting a bracket around the whole 
key signature and can use that as an emergency stoppgapp solution but i 
would like a neater more exakt notation showing exaktly what has ben 
editorialy added. )

Yours Andrea Stenberg