[support.srcloc] Fix comments in example.

Author: jensmaurer

source/support.tex

@@ -3321,16 +3321,16 @@
   source_location member = source_location::current();
   int other_member;
   s(source_location loc = source_location::current())
-    : member(loc)               // values of \tcode{member} will be from call-site
+    : member(loc)               // values of \tcode{member} refer to the location of the calling function\iref{dcl.fct.default}
   {}
-  s(int blather) :              // values of \tcode{member} should be hereabouts
+  s(int blather) :              // values of \tcode{member} refer to this location
     other_member(blather)
   {}
-  s(double)                     // values of \tcode{member} should be hereabouts
+  s(double)                     // values of \tcode{member} refer to this location
   {}
 };
 void f(source_location a = source_location::current()) {
-  source_location b = source_location::current();       // values in \tcode{b} represent this line
+  source_location b = source_location::current();       // values in \tcode{b} refer to this line
 }
 
 void g() {