1 03/05/76 change, c
 2 
 3 Function: replaces a string of characters within a line with a new
 4 string.
 5 
 6 
 7 Syntax: c /old_string/new_string/ first_line {last_line}
 8 
 9 
10 Arguments:
11 /   is a delimiter that can be any character not found in old_string
12 or new_string except blank, tab, or digit.
13 
14 old_string   is a string of characters to be replaced.
15 
16 new_string   is a string of characters to be substituted for each
17 occurrence of old_string.
18 
19 first_line   is the first line to be changed.
20 
21 last_line   is the last line to be changed; if omitted, only
22 first_line is changed.
23 
24 
25 Notes:
26 It is not possible to change line number at beginning of line
27 with this command.
28 
29 The first_line and last_line do not have to appear in the text, but the
30 range specified by them must contain at least one line.