Import the patch of Eckehard Berns to add insert mode. Thanks!
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					@ -2100,6 +2100,10 @@ tputc(char *c, int len) {
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		sel.bx = -1;
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							sel.bx = -1;
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	if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
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						if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
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		tnewline(1); /* always go to first col */
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							tnewline(1); /* always go to first col */
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						if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
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							memmove(&term.line[term.c.y][term.c.x+1],
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								&term.line[term.c.y][term.c.x],
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								(term.col - term.c.x - 1) * sizeof(Glyph));
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	tsetchar(c, &term.c.attr, term.c.x, term.c.y);
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						tsetchar(c, &term.c.attr, term.c.x, term.c.y);
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	if(term.c.x+1 < term.col)
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						if(term.c.x+1 < term.col)
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		tmoveto(term.c.x+1, term.c.y);
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							tmoveto(term.c.x+1, term.c.y);
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					@ -153,6 +153,7 @@ st| simpleterm,
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	ritm=\E[23m,
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						ritm=\E[23m,
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	rmacs=\E(B,
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						rmacs=\E(B,
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	rmcup=\E[?1049l,
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						rmcup=\E[?1049l,
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						rmir=\E[4l,
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	rmkx=\E[?1l\E>,
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						rmkx=\E[?1l\E>,
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	rmso=\E[23m,
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						rmso=\E[23m,
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	rmul=\E[m,
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						rmul=\E[m,
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					@ -168,6 +169,7 @@ st| simpleterm,
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	sitm=\E[3m,
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						sitm=\E[3m,
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	smacs=\E(0,
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						smacs=\E(0,
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	smcup=\E[?1049h,
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						smcup=\E[?1049h,
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						smir=\E[4h,
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	smkx=\E[?1h\E=,
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						smkx=\E[?1h\E=,
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	smso=\E[3m,
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						smso=\E[3m,
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	smul=\E[4m,
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						smul=\E[4m,
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