addressed small portions of github issues #278 and #353: updated descriptions of standard-input-port and standard-output-port; fixed a missing "and" in the description of utf-16-codec,
addressed small portions of github issues #278 and #353:
updated descriptions of standard-input-port and standard-output-port;
fixed a missing "and" in the description of utf-16-codec,

gus-massa/ChezScheme,gus-massa/ChezScheme,cisco/ChezScheme,cisco/ChezScheme,cisco/ChezScheme,gus-massa/ChezScheme