�|Description:�%
The \vrule markup draws a vertical rule. It is a native TEX markup, and
the usage is different in that the parameter is not surrounded with curly
braces. If you do not supply a dimension, TEXT1 will print the rule with
a height of the highest character in that line and the depth of the deepest
character in that line. By default, the rule drawn has a thickness (width)
of .4pt.
�|Notes:�%
Refer to The TEXbook for more on \vrule and how to use the "depth" parameter
with the "height" and "width" parameters.
