Function: strexpand
Section: programming/specific
C-Name: strexpand
Prototype: s*
Help: strexpand({x}*): concatenates its (string) arguments into a single
 string, performing tilde expansion.
Doc:
 converts its argument list into a
 single character string (type \typ{STR}, the empty string if $x$ is omitted).
 Then perform \idx{environment expansion}, see \secref{se:envir}.
 This feature can be used to read \idx{environment variable} values.
 \bprog
 ? strexpand("$HOME/doc")
 %1 = "/home/pari/doc"

 ? module = "aprcl"; n = 10;
 ? strexpand("$HOME/doc/", module, n, ".tex")
 %3 = "/home/pari/doc/aprcl10.tex"
 @eprog

 The individual arguments are read in string context, see \secref{se:strings}.

Function: Strexpand
Section: programming/specific
C-Name: strexpand
Prototype: s*
Obsolete: 2018-10-01
Help: Strexpand({x}*): deprecated alias for strexpand
Doc: deprecated alias for strexpand
