Display text file using less in Cygwin terminal or xterm incorrect when lines are longer than window width

[C Linus Hicks]

On Sat, 2021-08-14 at 11:48 +0900, Takashi Yano wrote:
> On Fri, 13 Aug 2021 21:47:53 -0400
> C Linus Hicks wrote:
> > On Mon, 2021-08-09 at 15:17 -0400, C Linus Hicks via Cygwin wrote:
> > > On Sat, 2021-08-07 at 13:33 -0600, Brian Inglis wrote:
> > > > Works Just Fine For Me!
> > > > 
> > > This is Cygwin 64 on Windows 10 in a VirtualBox VM, cygcheck output attached.
> > > 
> > > It has been a while since I updated Cygwin; as long as it serves my purpose, I generally don't focus
> > > on that; it is just a tool I use.
> > > 
> > > Since I did open this thread, of course I need to make sure I am up-to-date. I have now done that
> > > and I don't see issues with Cygwin terminal and less, although that is not really where I am
> > > focusing. I mostly use xterm windows just because there are several characteristics I like about it.
> > > 
> > > I am still seeing issues with xterm and less, as I stated in my original post.
> > > 
> > Did I post this in the wrong list? I have not gotten a response since my update.
> 
> 1) Does your problem also happen even if the text file contains only
>    ASCII chars?
> 2) What does 'which less' say?
> 3) What does 'infocmp' say?
> 

Most of the files I view have only ASCII text.

lhicks@ESG-Win10-1 ~
$ echo $TERM
xterm

lhicks@ESG-Win10-1 ~
$ which less
/usr/bin/less

lhicks@ESG-Win10-1 ~
$ infocmp
#       Reconstructed via infocmp from file: /usr/share/terminfo/78/xterm
xterm|xterm terminal emulator (X Window System),
        am, bce, km, mc5i, mir, msgr, npc, xenl,
        colors#8, cols#80, it#8, lines#24, pairs#64,
        acsc=``aaffggiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz{{||}}~~,
        bel=^G, blink=\E[5m, bold=\E[1m, cbt=\E[Z, civis=\E[?25l,
        clear=\E[H\E[2J, cnorm=\E[?12l\E[?25h, cr=\r,
        csr=\E[%i%p1%d;%p2%dr, cub=\E[%p1%dD, cub1=^H,
        cud=\E[%p1%dB, cud1=\n, cuf=\E[%p1%dC, cuf1=\E[C,
        cup=\E[%i%p1%d;%p2%dH, cuu=\E[%p1%dA, cuu1=\E[A,
        cvvis=\E[?12;25h, dch=\E[%p1%dP, dch1=\E[P, dim=\E[2m,
        dl=\E[%p1%dM, dl1=\E[M, ech=\E[%p1%dX, ed=\E[J, el=\E[K,
        el1=\E[1K, flash=\E[?5h$<100/>\E[?5l, home=\E[H,
        hpa=\E[%i%p1%dG, ht=^I, hts=\EH, ich=\E[%p1%d@,
        il=\E[%p1%dL, il1=\E[L, ind=\n, indn=\E[%p1%dS,
        invis=\E[8m, is2=\E[!p\E[?3;4l\E[4l\E>, kDC=\E[3;2~,
        kEND=\E[1;2F, kHOM=\E[1;2H, kIC=\E[2;2~, kLFT=\E[1;2D,
        kNXT=\E[6;2~, kPRV=\E[5;2~, kRIT=\E[1;2C, ka1=\EOw,
        ka3=\EOy, kb2=\EOu, kbs=^H, kc1=\EOq, kc3=\EOs, kcbt=\E[Z,
        kcub1=\EOD, kcud1=\EOB, kcuf1=\EOC, kcuu1=\EOA,
        kdch1=\E[3~, kend=\EOF, kent=\EOM, kf1=\EOP, kf10=\E[21~,
        kf11=\E[23~, kf12=\E[24~, kf13=\E[1;2P, kf14=\E[1;2Q,
        kf15=\E[1;2R, kf16=\E[1;2S, kf17=\E[15;2~, kf18=\E[17;2~,
        kf19=\E[18;2~, kf2=\EOQ, kf20=\E[19;2~, kf21=\E[20;2~,
        kf22=\E[21;2~, kf23=\E[23;2~, kf24=\E[24;2~,
        kf25=\E[1;5P, kf26=\E[1;5Q, kf27=\E[1;5R, kf28=\E[1;5S,
        kf29=\E[15;5~, kf3=\EOR, kf30=\E[17;5~, kf31=\E[18;5~,
        kf32=\E[19;5~, kf33=\E[20;5~, kf34=\E[21;5~,
        kf35=\E[23;5~, kf36=\E[24;5~, kf37=\E[1;6P, kf38=\E[1;6Q,
        kf39=\E[1;6R, kf4=\EOS, kf40=\E[1;6S, kf41=\E[15;6~,
        kf42=\E[17;6~, kf43=\E[18;6~, kf44=\E[19;6~,
        kf45=\E[20;6~, kf46=\E[21;6~, kf47=\E[23;6~,
        kf48=\E[24;6~, kf49=\E[1;3P, kf5=\E[15~, kf50=\E[1;3Q,
        kf51=\E[1;3R, kf52=\E[1;3S, kf53=\E[15;3~, kf54=\E[17;3~,
        kf55=\E[18;3~, kf56=\E[19;3~, kf57=\E[20;3~,
        kf58=\E[21;3~, kf59=\E[23;3~, kf6=\E[17~, kf60=\E[24;3~,
        kf61=\E[1;4P, kf62=\E[1;4Q, kf63=\E[1;4R, kf7=\E[18~,
        kf8=\E[19~, kf9=\E[20~, khome=\EOH, kich1=\E[2~,
        kind=\E[1;2B, kmous=\E[<, knp=\E[6~, kpp=\E[5~,
        kri=\E[1;2A, mc0=\E[i, mc4=\E[4i, mc5=\E[5i, meml=\El,
        memu=\Em, mgc=\E[?69l, op=\E[39;49m, rc=\E8,
        rep=%p1%c\E[%p2%{1}%-%db, rev=\E[7m, ri=\EM,
        rin=\E[%p1%dT, ritm=\E[23m, rmacs=\E(B, rmam=\E[?7l,
        rmcup=\E[?1049l\E[23;0;0t, rmir=\E[4l, rmkx=\E[?1l\E>,
        rmm=\E[?1034l, rmso=\E[27m, rmul=\E[24m, rs1=\Ec,
        rs2=\E[!p\E[?3;4l\E[4l\E>, sc=\E7, setab=\E[4%p1%dm,
        setaf=\E[3%p1%dm,
        setb=\E[4%?%p1%{1}%=%t4%e%p1%{3}%=%t6%e%p1%{4}%=%t1%e%p1%{6}%=%t3%e%p1%d%;m,
        setf=\E[3%?%p1%{1}%=%t4%e%p1%{3}%=%t6%e%p1%{4}%=%t1%e%p1%{6}%=%t3%e%p1%d%;m,
        sgr=%?%p9%t\E(0%e\E(B%;\E[0%?%p6%t;1%;%?%p5%t;2%;%?%p2%t;4%;%?%p1%p3%|%t;7%;%?%p4%t;5%;%?%p7
%t;8%;m,
        sgr0=\E(B\E[m, sitm=\E[3m, smacs=\E(0, smam=\E[?7h,
        smcup=\E[?1049h\E[22;0;0t,
        smglr=\E[?69h\E[%i%p1%d;%p2%ds, smir=\E[4h,
        smkx=\E[?1h\E=, smm=\E[?1034h, smso=\E[7m, smul=\E[4m,
        tbc=\E[3g, u6=\E[%i%d;%dR, u7=\E[6n,
        u8=\E[?%[;0123456789]c, u9=\E[c, vpa=\E[%i%p1%dd,