(\dots, \enddots): Use current font instead of always using math italic.

texinfo.tex

@@ -441,14 +441,11 @@
 % @. is an end-of-sentence period.
 \def\.{.\spacefactor=3000 }
 
-% @enddots{} is an end-of-sentence ellipsis.
-\gdef\enddots{$\mathinner{\ldotp\ldotp\ldotp\ldotp}$\spacefactor=3000}
-
 % @! is an end-of-sentence bang.
-\gdef\!{!\spacefactor=3000 }
+\def\!{!\spacefactor=3000 }
 
 % @? is an end-of-sentence query.
-\gdef\?{?\spacefactor=3000 }
+\def\?{?\spacefactor=3000 }
 
 % @w prevents a word break.  Without the \leavevmode, @w at the
 % beginning of a paragraph, when TeX is still in vertical mode, would
@@ -573,9 +570,27 @@ where each line of input produces a line of output.}
 
 \let\br = \par
 
-% @dots{}  output some dots
+% @dots{} output an ellipsis using the current font.
+% We do .5em per period so that it has the same spacing in a typewriter
+% font as three actual period characters.
+%
+\def\dots{\hbox to 1.5em{%
+  \hskip 0pt plus 0.25fil minus 0.25fil
+  .\hss.\hss.%
+  \hskip 0pt plus 0.5fil minus 0.5fil
+}}
+
+% @enddots{} is an end-of-sentence ellipsis.
+% 
+\def\enddots{%
+  \hbox to 2em{%
+    \hskip 0pt plus 0.25fil minus 0.25fil
+    .\hss.\hss.\hss.%
+    \hskip 0pt plus 0.5fil minus 0.5fil
+  }%
+  \spacefactor=3000
+}
 
-\def\dots{$\ldots$}
 
 % @page    forces the start of a new page