[fs.rec.dir.itr.members] Merge adjacent \tcode commands (#7621)

Author: jwakely

source/iostreams.tex

@@ -17085,7 +17085,7 @@
 
 \pnum
 \begin{note}
-\tcode{disable_recursion_pending}\tcode{()} is used to prevent
+\tcode{disable_recursion_pending()} is used to prevent
   unwanted recursion into a directory.
 \end{note}
 \end{itemdescr}