A conforming implementation of ISO C is required to document its
choice of behavior in each of the areas that are designated
-``implementation defined.'' The following lists all such areas,
+``implementation defined''. The following lists all such areas,
along with the section numbers from the ISO/IEC 9899:1990 and ISO/IEC
9899:1999 standards. Some areas are only implementation-defined in
one version of the standard.
@item
@cite{How a diagnostic is identified (C90 3.7, C99 3.10, C90 and C99 5.1.1.3).}
-Diagnostics consist of all the output sent to stderr by GCC.
+Diagnostics consist of all the output sent to stderr by GCC@.
@item
@cite{Whether each nonempty sequence of white-space characters other than