Problem:
The use of a construction of the form:
{\hskip 0.60in} XSPEC>
results in undesired HTML output of the form:
0.6in xspec>
Solution:
The use the LaTeX command:
\hspace{0.60in} XSPEC>
instead, which appears to work as expected under LaTeX, and have
no effect undert html, eg:
xspec>