[PATCH 19/29] doc/guides: improve sample applications introduction

[Stephen Hemminger <stephen@networkplumber.org>]

Improve the sample applications introduction documentation:
- use consistent title capitalization in cross-references
- replace contractions with full forms
- use I/O instead of IO
- fix punctuation and grammar

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 doc/guides/sample_app_ug/intro.rst | 54 +++++++++++++++---------------
 1 file changed, 27 insertions(+), 27 deletions(-)

diff --git a/doc/guides/sample_app_ug/intro.rst b/doc/guides/sample_app_ug/intro.rst
index a19c0b8c13..25a15966db 100644
--- a/doc/guides/sample_app_ug/intro.rst
+++ b/doc/guides/sample_app_ug/intro.rst
@@ -4,8 +4,8 @@
 Introduction to the DPDK Sample Applications
 ============================================
 
-The DPDK Sample Applications are small standalone applications that
-demonstrate various features of DPDK. They can be considered as a cookbook of
+The DPDK sample applications are small standalone applications that
+demonstrate various features of DPDK. They can be considered a cookbook of
 DPDK features. Users interested in getting started with DPDK can take the
 applications, try out the features, and then extend them to fit their needs.
 
@@ -14,8 +14,8 @@ Running Sample Applications
 ---------------------------
 
 Some sample applications may have their own command-line parameters described in
-their respective guides. However, they all also share the same EAL parameters.
-Please refer to :doc:`EAL parameters (Linux) <../linux_gsg/linux_eal_parameters>`
+their respective guides. However, they also all share the same EAL parameters.
+Refer to :doc:`EAL parameters (Linux) <../linux_gsg/linux_eal_parameters>`
 or :doc:`EAL parameters (FreeBSD) <../freebsd_gsg/freebsd_eal_parameters>` for
 a list of available EAL command-line options.
 
@@ -32,8 +32,8 @@ examples are highlighted below.
 * :doc:`Hello World<hello_world>`: As with most introductions to a
   programming framework, a good place to start is with the Hello World
   application. The Hello World example sets up the DPDK Environment Abstraction
-  Layer (EAL), and prints a simple "Hello World" message to each of the DPDK
-  enabled cores. This application doesn't do any packet forwarding, but it is a
+  Layer (EAL) and prints a simple "Hello World" message to each of the DPDK
+  enabled cores. This application does not do any packet forwarding, but it is a
   good way to test if the DPDK environment is compiled and set up properly.
 
 * :doc:`Basic Forwarding/Skeleton Application<skeleton>`: The Basic
@@ -41,25 +41,25 @@ examples are highlighted below.
   basic packet forwarding with DPDK. This allows you to test if your network
   interfaces are working with DPDK.
 
-* :doc:`Network Layer 2 forwarding<l2_forward_real_virtual>`: The Network Layer 2
-  forwarding, or ``l2fwd`` application does forwarding based on Ethernet MAC
+* :doc:`Network Layer 2 Forwarding<l2_forward_real_virtual>`: The Network Layer 2
+  forwarding, or ``l2fwd`` application, does forwarding based on Ethernet MAC
   addresses like a simple switch.
 
-* :doc:`Network Layer 2 forwarding<l2_forward_event>`: The Network Layer 2
-  forwarding, or ``l2fwd-event`` application does forwarding based on Ethernet MAC
-  addresses like a simple switch. It demonstrates usage of poll and event mode
-  IO mechanism under a single application.
+* :doc:`Network Layer 2 Forwarding with Event Mode<l2_forward_event>`: The Network
+  Layer 2 forwarding, or ``l2fwd-event`` application, does forwarding based on
+  Ethernet MAC addresses like a simple switch. It demonstrates usage of poll and
+  event mode I/O mechanisms under a single application.
 
-* :doc:`Network Layer 3 forwarding<l3_forward>`: The Network Layer3
-  forwarding, or ``l3fwd`` application does forwarding based on Internet
-  Protocol, IPv4 or IPv6 like a simple router.
+* :doc:`Network Layer 3 Forwarding<l3_forward>`: The Network Layer 3
+  forwarding, or ``l3fwd`` application, does forwarding based on Internet
+  Protocol (IPv4 or IPv6) like a simple router.
 
-* :doc:`Network Layer 3 forwarding Graph<l3_forward_graph>`: The Network Layer3
-  forwarding Graph, or ``l3fwd_graph`` application does forwarding based on IPv4
-  like a simple router with DPDK Graph framework.
+* :doc:`Network Layer 3 Forwarding Graph<l3_forward_graph>`: The Network Layer 3
+  forwarding Graph, or ``l3fwd_graph`` application, does forwarding based on IPv4
+  like a simple router using the DPDK Graph framework.
 
-* :doc:`Hardware packet copying<dma>`: The Hardware packet copying,
-  or ``dmafwd`` application demonstrates how to use DMAdev library for
+* :doc:`Hardware Packet Copying<dma>`: The hardware packet copying,
+  or ``dmafwd`` application, demonstrates how to use the DMAdev library for
   copying packets between two threads.
 
 * :doc:`Packet Distributor<dist_app>`: The Packet Distributor
@@ -70,27 +70,27 @@ examples are highlighted below.
   multi-process application shows how two DPDK processes can work together using
   queues and memory pools to share information.
 
-* :doc:`RX/TX callbacks Application<rxtx_callbacks>`: The RX/TX
+* :doc:`Rx/Tx Callbacks Application<rxtx_callbacks>`: The Rx/Tx
   callbacks sample application is a packet forwarding application that
   demonstrates the use of user-defined callbacks on received and transmitted
-  packets. The application calculates the latency of a packet between RX
-  (packet arrival) and TX (packet transmission) by adding callbacks to the RX
-  and TX packet processing functions.
+  packets. The application calculates the latency of a packet between Rx
+  (packet arrival) and Tx (packet transmission) by adding callbacks to the Rx
+  and Tx packet processing functions.
 
 * :doc:`IPsec Security Gateway<ipsec_secgw>`: The IPsec Security
   Gateway application is a minimal example of something closer to a real world
   example. This is also a good example of an application using the DPDK
   Cryptodev framework.
 
-* :doc:`Precision Time Protocol (PTP) client<ptpclient>`: The PTP
+* :doc:`Precision Time Protocol (PTP) Client<ptpclient>`: The PTP
   client is another minimal implementation of a real world application.
   In this case, the application is a PTP client that communicates with a PTP
   time transmitter to synchronize time on a Network Interface Card (NIC) using the
-  IEEE1588 protocol.
+  IEEE 1588 protocol.
 
 * :doc:`Quality of Service (QoS) Scheduler<qos_scheduler>`: The QoS
   Scheduler application demonstrates the use of DPDK to provide QoS scheduling.
 
 There are many more examples shown in the following chapters. Each of the
-documented sample applications show how to compile, configure and run the
+documented sample applications shows how to compile, configure, and run the
 application, as well as explaining the main functionality of the code.
-- 
2.51.0