packed-ring: fix plurals

There are two instances where plural needs to be used instead of
singular:

1. "descriptor(s)" is used later in the text, so use it consistently
   instead of starting with "descriptor" and switching later.

2. "What follows is the requirements" ->
   "What follows are the requirements"

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Fixes: https://github.com/oasis-tcs/virtio-spec/issues/7
Approved-by: https://www.oasis-open.org/committees/ballot.php?id=3184

1 files changed, 2 insertions, 2 deletions

diff --git a/packed-ring.tex b/packed-ring.tex
index 4e5c9b2..00befae 100644
--- a/packed-ring.tex
+++ b/packed-ring.tex
@@ -525,7 +525,7 @@ when using the packed virtqueue format in more detail.
 The driver offers buffers to one of the device's virtqueues as follows:
 
 \begin{enumerate}
-\item The driver places the buffer into free descriptor in the Descriptor Ring.
+\item The driver places the buffer into free descriptor(s) in the Descriptor Ring.
 
 \item The driver performs a suitable memory barrier to ensure that it updates
   the descriptor(s) before checking for notification suppression.
@@ -534,7 +534,7 @@ The driver offers buffers to one of the device's virtqueues as follows:
     of the new available buffers.
 \end{enumerate}
 
-What follows is the requirements of each stage in more detail.
+What follows are the requirements of each stage in more detail.
 
 \subsubsection{Placing Available Buffers Into The Descriptor Ring}\label{sec:Basic Facilities of a Virtio Device / Virtqueues / Supplying Buffers to The Device / Placing Available Buffers Into The Descriptor Ring}