Added U+2026 … horizontal ellipsis (looks like ...) as alt+3.
Suggest U+2024 and U+2025 (one and two dot leaders) be added as 1. and 2.
Alternately, use 1d, 2d, and 3d, reserving the [1-9]\. form for U+2488–2490, “Digit — Full Stop”

Notes:
Fri Apr 6 10:30:38 EDT 2007 rsc
    i added 1. 2. and 3. to /lib/keyboard.
    i'm sure no one knows the difference
    between alt 3. and alt el but so be it.
    
    note that latin1.h is automatically generated.


Reference: /n/sources/patch/applied/keyboard-ellipsis
Date: Mon Oct  9 08:44:29 CES 2006
Signed-off-by: JoelCSalomon@Gmail.com
Reviewed-by: rsc

--- /sys/src/9/port/latin1.h	Mon Oct  9 08:37:31 2006
+++ /sys/src/9/port/latin1.h	Mon Oct  9 08:37:28 2006
@@ -16,7 +16,7 @@
 	"/", "Oo",	L"Øø",
 	"1", "234568",	L"½⅓¼⅕⅙⅛",
 	"2", "-35",	L"ƻ⅔⅖",
-	"3", "458",	L"¾⅗⅜",
+	"3", "458.",	L"¾⅗⅜…",
 	"4", "5",	L"⅘",
 	"5", "68",	L"⅚⅝",
 	"7", "8",	L"⅞",
--- /lib/keyboard	Mon Oct  9 08:38:03 2006
+++ /lib/keyboard	Mon Oct  9 08:37:54 2006
@@ -392,6 +392,7 @@
 2020  dg          †	dagger
 2021  dd          ‡	double dagger
 2022  bu          •	bullet
+2026  3.           …         horizontal ellipsis
 203D  !? ?!       ‽	interrobang
 2070  s0          ⁰	superscript digit zero
 2071  s1          ⁱ	superscript digit one
@@ -410,7 +411,7 @@
 207E  s)          ⁾	superscript closing parenthesis
 207F  sn          ⁿ	superscript latin small letter n
 2013  en          –	en dash
-2014  em          –	em dash
+2014  em         —	em dash
 2080  b0          ₀	subscript digit zero
 2081  b1          ₁	subscript digit one
 2082  b2          ₂	subscript digit two