[address1
][,
address2
]P
Print first part (up to embedded newline) of multi-line pattern created by N command. Same as p if N has not been applied to a line.
Suppose you have function references in two formats:
function(a,b,c) function(a, b, c)
The following script changes argument c, regardless of whether it appears on the same line as the function name:
s/function(a,b,c)/function(a,b,XX)/ /function(/{ N s/c/XX/ P D }