jmanやmanをテキストにする方法

man ls > /tmp/ls.txt

LS(1)                   FreeBSD General Commands Manual                  LS(1)

N^HNA^HAM^HME^HE
     l^Hls^Hs -- list directory contents

S^HSY^HYN^HNO^HOP^HPS^HSI^HIS^HS
     l^Hls^Hs [-^H-A^HAB^HBC^HCF^HFG^HGH^HHL^HLP^HPR^HRS^HST^HTW^HWZ^HZa^Hab^Hbc^Hcd^Hdf^Hfg^Hgh^Hhi^Hik^Hkl^Hlm^Hmn^Hno^Hop^Hpq^Hqr^Hrs^Hst^Htu^Huw^Hwx^Hx1^H1] [_^Hf_^Hi_^Hl_^He _^H._^H._^H.]

man ls | col -b >/tmp/ls.txt

LS(1)			FreeBSD General Commands Manual 		 LS(1)

NAME
     ls -- list directory contents

SYNOPSIS
     ls [-ABCFGHLPRSTWZabcdfghiklmnopqrstuwx1] [file ...]

DESCRIPTION
     For each operand that names a file of a type other than directory, ls

man ls | colcrt >/tmp/ls.txt

LS(1)                   FreeBSD General Commands Manual                  LS(1)

NAME
     ls -- list directory contents

SYNOPSIS
     ls [-ABCFGHLPRSTWZabcdfghiklmnopqrstuwx1] [file ...]
                                                ---- ---

DESCRIPTION