[PATCH] packed-ring.tex: Add comma and remove redundancy to improve readability

[Yodel Eldar <yodel.eldar@yodel.dev>]

A comma after "set" separates the prepositional phrase from the main
clause where both the prepositional object and subject of the main
clause are long descriptor flags, thereby improving readability.

Also, the second "is" refers to the same subject as the first and is,
therefore, redundant. Eliminating it improves the flow of the sentence.

Signed-off-by: Yodel Eldar <yodel.eldar@yodel.dev>
---
 packed-ring.tex | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packed-ring.tex b/packed-ring.tex
index 3ee55a1..f0b0cdd 100644
--- a/packed-ring.tex
+++ b/packed-ring.tex
@@ -271,8 +271,8 @@ \subsection{Indirect Flag: Scatter-Gather Support}
 are reserved and are ignored by the device.
 Buffer ID is also reserved and is ignored by the device.
 
-In descriptors with VIRTQ_DESC_F_INDIRECT set VIRTQ_DESC_F_WRITE
-is reserved and is ignored by the device.
+In descriptors with VIRTQ_DESC_F_INDIRECT set, VIRTQ_DESC_F_WRITE
+is reserved and ignored by the device.
 
 \subsection{In-order use of descriptors}
 \label{sec:Packed Virtqueues / In-order use of descriptors}
-- 
2.52.0