Function: Strtex
Section: conversions
C-Name: Strtex
Prototype: s*
Help: Strtex({x}*): translates its (string) arguments to TeX format and
 returns the resulting string.
Doc:
 translates its arguments to TeX
 format, and concatenates the results into a single character string (type
 \typ{STR}, the empty string if $x$ is omitted).

 The individual arguments are read in string context, see \secref{se:strings}.
 %\syn{NO}
