Using seq_putc to print a single character saves at least a strlen()
call and a memory access, and may also give a small .text reduction.
Signed-off-by: NRasmus Villemoes <linux@rasmusvillemoes.dk>
Reviewed-by: NFinn Thain <fthain@telegraphics.com.au>
Signed-off-by: NChristoph Hellwig <hch@lst.de>