As soon as you see the line appear after having hit enter, do CTRL-Z (Undo)
to bring back the dashes.
Otherwise, if the line is already there:
Place your cursor in the paragraph immediately above the line;
Select Borders & Shading from the Format menu;
Select None (top left corner);
Click OK;
Done!
--
Cheers!
_______________________________________
Jean-Guy Marcil - Word MVP
(e-mail address removed)
Word MVP site: http://www.word.mvps.org
Click on the paragraph above the line, click "Format", "Borders and
shading", click the "Borders" TAB, and click "None". To turn it off
completely so it never happens again, click "Tools", "Autocorrect
options...", click the "Autoformat As You Type" TAB, then uncheck "Border
lines".