[fs.rec.dir.itr.members] Grammar fixes. (#1903)

Author: CaseyCarter

source/iostreams.tex

@@ -14057,8 +14057,8 @@
 \begin{itemdescr}
 
 \pnum
-\effects Constructs a iterator representing the first
-entry in the directory \tcode{p} resolves to, if any; otherwise, the end iterator.
+\effects Constructs an iterator representing the first
+entry in the directory to which \tcode{p} resolves, if any; otherwise, the end iterator.
 However, if
 \begin{codeblock}
 (options & directory_options::skip_permission_denied) != directory_options::none