Addresses
If no address is given, the current line is the object of the command. If the address specifies a range of lines, the format is:
x,y
where x and y are the first and last addressed lines (x must precede y in the buffer). x and y may each be a line number or a symbol. Using ; instead of , sets the current line to x before interpreting y. The notation 1,$ addresses all lines in the file, as does %.
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