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Change only the fist instance of a string

Posted: Sun Oct 28, 2012 2:35 am
by scottmm78
I am modding a video game and need to change 1000+ files. Each file has several lines like
#b_xxxxxx
#b_xxxxxy
#b_xxxxxz

I need to change the first instance in each file ie
b_xxxxxx
#b_xxxxxy
#b_xxxxxz

Can this be done in text crawler or am i stuck manually opening and edit each file.

Also the formatting in each file is not the same so the first instance is not on the same line each time some times line 7 some times line 8,9, or 10