" Macro to filter the whole buffer for rot13 coding
map gr GoabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ:%s/a/@/g|%s/n/a/g|%s/@/n/g|%s/b/@/g|%s/o/b/g|%s/@/o/g|%s/c/@/g|%s/p/c/g|%s/@/p/g|%s/d/@/g|%s/q/d/g|%s/@/q/g|%s/e/@/g|%s/r/e/g|%s/@/r/g|%s/f/@/g|%s/s/f/g|%s/@/s/g|%s/g/@/g|%s/t/g/g|%s/@/t/g|%s/h/@/g|%s/u/h/g|%s/@/u/g|%s/i/@/g|%s/v/i/g|%s/@/v/g|%s/j/@/g|%s/w/j/g|%s/@/w/g|%s/k/@/g|%s/x/k/g|%s/@/x/g|%s/l/@/g|%s/y/l/g|%s/@/y/g|%s/m/@/g|%s/z/m/g|%s/@/z/g|%s/A/@/g|%s/N/A/g|%s/@/N/g|%s/B/@/g|%s/O/B/g|%s/@/O/g|%s/C/@/g|%s/P/C/g|%s/@/P/g|%s/D/@/g|%s/Q/D/g|%s/@/Q/g|%s/E/@/g|%s/R/E/g|%s/@/R/g|%s/F/@/g|%s/S/F/g|%s/@/S/g|%s/G/@/g|%s/T/G/g|%s/@/T/g|%s/H/@/g|%s/U/H/g|%s/@/U/g|%s/I/@/g|%s/V/I/g|%s/@/V/g|%s/J/@/g|%s/W/J/g|%s/@/W/g|%s/K/@/g|%s/X/K/g|%s/@/X/g|%s/L/@/g|%s/Y/L/g|%s/@/Y/g|%s/M/@/g|%s/Z/M/g|%s/@/Z/gGdd
