Fixing truncation handling in SEXP_WRITE_STRING_OP.
Fixing truncation handling in SEXP_WRITE_STRING_OP.

holmescn/chibi-scheme,holmescn/chibi-scheme,norton/chibi-scheme,norton/chibi-scheme,holmescn/chibi-scheme,norton/chibi-scheme,norton/chibi-scheme,holmescn/chibi-scheme,norton/chibi-scheme,holmescn/chibi-scheme,norton/chibi-scheme