[format.string.general,format.formatter.spec] Fix unparenthesized cross-references

Author: jensmaurer

source/text.tex

@@ -6032,12 +6032,12 @@
 For arithmetic, pointer, and string types
 the \fmtgrammarterm{format-spec}
 is interpreted as a \fmtgrammarterm{std-format-spec}
-as described in \iref{format.string.std}.
+as described in~\ref{format.string.std}.
 \item
 For chrono types
 the \fmtgrammarterm{format-spec}
 is interpreted as a \fmtgrammarterm{chrono-format-spec}
-as described in \iref{time.format}.
+as described in~\ref{time.format}.
 \item
 For user-defined \tcode{formatter} specializations,
 the behavior of the \tcode{parse} member function
@@ -7206,7 +7206,7 @@
 The \tcode{parse} member functions of these formatters
 interpret the format specification
 as a \fmtgrammarterm{std-format-spec}
-as described in \ref{format.string.std}.
+as described in~\ref{format.string.std}.
 
 \pnum
 Unless specified otherwise, for each type \tcode{T} for which