Function: filewrite1
Section: programming/specific
C-Name: gp_filewrite1
Prototype: vLs
Help: filewrite1(n, s): write the string s to file number n without ending with newline.
Doc: write the string $s$ to the file attached to descriptor $n$.
 The file must have been opened with \kbd{fileopen} in \kbd{"w"} or \kbd{"a"}
 mode.

 If you want to append a newline at the end of $s$, you can use
 \kbd{Str(s,"\bs n")} or \kbd{filewrite}.
