[strings] Improved indexing of macros

Author: AlisdairM

source/strings.tex

@@ -5217,7 +5217,7 @@
 \tcode{invalid_argument} if \tcode{strtol}, \tcode{strtoul},
 \tcode{strtoll}, or \tcode{strtoull} reports that no conversion can be
 performed. Throws \tcode{out_of_range} if \tcode{strtol}, \tcode{strtoul},
-\tcode{strtoll} or \tcode{strtoull} sets \tcode{errno} to \tcode{ERANGE},
+\tcode{strtoll} or \tcode{strtoull} sets \tcode{\libmacro{errno}} to \tcode{ERANGE},
 or if the converted value is outside the range of representable values
 for the return type.
 \end{itemdescr}
@@ -5252,7 +5252,7 @@
 \tcode{invalid_argument} if \tcode{strtof}, \tcode{strtod}, or
 \tcode{strtold} reports that no conversion can be performed. Throws
 \tcode{out_of_range} if \tcode{strtof}, \tcode{strtod}, or
-\tcode{strtold} sets \tcode{errno} to \tcode{ERANGE}
+\tcode{strtold} sets \tcode{\libmacro{errno}} to \tcode{ERANGE}
 or if the converted value is outside the range of representable
 values for the return type.
 \end{itemdescr}
@@ -5341,7 +5341,7 @@
 \throws
 \tcode{invalid_argument} if \tcode{wcstof}, \tcode{wcstod}, or \tcode{wcstold} reports that no
 conversion can be performed. Throws \tcode{out_of_range} if \tcode{wcstof}, \tcode{wcstod}, or
-\tcode{wcstold} sets \tcode{errno} to \tcode{ERANGE}.
+\tcode{wcstold} sets \tcode{\libmacro{errno}} to \tcode{ERANGE}.
 \end{itemdescr}
 
 \indexlibraryglobal{to_wstring}%
@@ -5500,7 +5500,7 @@
   size_t strlen(const char* s);                                         // freestanding
 }
 
-#define NULL @\textit{see \ref{support.types.nullptr}}@                                                // freestanding
+#define @\libmacro{NULL}@ @\textit{see \ref{support.types.nullptr}}@                                                // freestanding
 \end{codeblock}
 
 \pnum