[fs.op.remove.all] Clarify the effect when p is not a directory

cpplearner · cpplearner · commit 32c8862a8c31 · 2020-03-16T15:52:30.000+08:00
diff --git a/source/iostreams.tex b/source/iostreams.tex
@@ -16421,8 +16421,8 @@
 \begin{itemdescr}
 \pnum
 \effects
-Recursively deletes the contents of \tcode{p} if it exists,
-  then deletes file \tcode{p} itself, as if by POSIX \tcode{remove()}.
+Same as \tcode{remove}\iref{fs.op.remove}, except that if \tcode{p} is a directory,
+  also recursively deletes the contents of \tcode{p}.
 \begin{note}
 A symbolic link is itself removed, rather than the file it
   resolves to.
