[PATCH v4 07/11] doc: correct typos in log library guide

[Stephen Hemminger]

Changes:
- Fix spelling errors (stystem -> system, acheived -> achieved)
- Fix sentence structure for rte_log() parameter description
- Use consistent spelling "timestamp" (one word)

Signed-off-by: Nandini Persad <nandinipersad361 at gmail.com>
Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
---
 doc/guides/prog_guide/log_lib.rst | 32 +++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/doc/guides/prog_guide/log_lib.rst b/doc/guides/prog_guide/log_lib.rst
index 3e888b8965..a3d6104e72 100644
--- a/doc/guides/prog_guide/log_lib.rst
+++ b/doc/guides/prog_guide/log_lib.rst
@@ -6,7 +6,7 @@ Log Library
 
 The DPDK Log library provides the logging functionality for other DPDK libraries and drivers.
 By default, logs are sent only to standard error output of the process.
-The syslog EAL option can be used to redirect to the stystem logger on Linux and FreeBSD.
+The syslog EAL option can be used to redirect to the system logger on Linux and FreeBSD.
 In addition, the log can be redirected to a different stdio file stream.
 
 Log Levels
@@ -26,14 +26,14 @@ These levels, specified in ``rte_log.h`` are (from most to least important):
 
 At runtime, only messages of a configured level or above (i.e. of higher importance)
 will be emitted by the application to the log output.
-That level can be configured either by the application calling the relevant APIs from the logging library,
+That level can be configured either by the application calling relevant APIs from the logging library,
 or by the user passing the ``--log-level`` parameter to the EAL via the application.
 
 Setting Global Log Level
 ~~~~~~~~~~~~~~~~~~~~~~~~
 
 To adjust the global log level for an application,
-just pass a numeric level or a level name to the ``--log-level`` EAL parameter.
+pass a numeric level or a level name to the ``--log-level`` EAL parameter.
 For example::
 
 	/path/to/app --log-level=error
@@ -47,9 +47,9 @@ Within an application, the log level can be similarly set using the ``rte_log_se
 Setting Log Level for a Component
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-In some cases, for example, for debugging purposes,
-it may be desirable to increase or decrease the log level for only a specific component, or set of components.
-To facilitate this, the ``--log-level`` argument also accepts an, optionally wildcarded, component name,
+In some cases (such as debugging purposes),
+you may want to increase or decrease the log level for only a specific component or set of components.
+To facilitate this, the ``--log-level`` argument also accepts an optionally wildcarded component name,
 along with the desired level for that component.
 For example::
 
@@ -57,13 +57,13 @@ For example::
 
 	/path/to/app --log-level=lib.*:warning
 
-Within an application, the same result can be got using the ``rte_log_set_level_pattern()`` or ``rte_log_set_level_regex()`` APIs.
+Within an application, the same result can be achieved by using the ``rte_log_set_level_pattern()`` or ``rte_log_set_level_regex()`` APIs.
 
 
 Using Logging APIs to Generate Log Messages
 -------------------------------------------
 
-To output log messages, ``rte_log()`` API function should be used.
+To output log messages, the ``rte_log()`` API function should be used.
 As well as the log message, ``rte_log()`` takes two additional parameters:
 
 * The log level
@@ -74,16 +74,16 @@ The component type is a unique id that identifies the particular DPDK component
 To get this id, each component needs to register itself at startup,
 using the macro ``RTE_LOG_REGISTER_DEFAULT``.
 This macro takes two parameters, with the second being the default log level for the component.
-The first parameter, called "type", the name of the "logtype", or "component type" variable used in the component.
-This variable will be defined by the macro, and should be passed as the second parameter in calls to ``rte_log()``.
+The first parameter, called "type", is the name of the "logtype", or "component type" variable used in the component.
+This variable will be defined by the macro and should be passed as the second parameter in calls to ``rte_log()``.
 In general, most DPDK components define their own logging macros to simplify the calls to the log APIs.
 They do this by:
 
 * Hiding the component type parameter inside the macro so it never needs to be passed explicitly.
 * Using the log-level definitions given in ``rte_log.h`` to allow short textual names to be used in
-  place of the numeric log levels.
+  place of numeric log levels.
 
-The following code is taken from ``rte_cfgfile.c`` and shows the log registration,
+The following code is taken from ``rte_cfgfile.c`` and shows the log registration
 and subsequent definition of a shortcut logging macro.
 It can be used as a template for any new components using DPDK logging.
 
@@ -98,10 +98,10 @@ It can be used as a template for any new components using DPDK logging.
 	it should be placed near the top of the C file using it.
 	If not, the logtype variable should be defined as an "extern int" near the top of the file.
 
-	Similarly, if logging is to be done by multiple files in a component,
-	only one file should register the logtype via the macro,
+	Similarly, if logging will be done by multiple files in a component,
+	only one file should register the logtype via the macro
 	and the logtype should be defined as an "extern int" in a common header file.
-	Any component-specific logging macro should similarly be defined in that header.
+	Any component-specific logging macro should be similarly defined in that header.
 
 Throughout the cfgfile library, all logging calls are therefore of the form:
 
@@ -122,7 +122,7 @@ For example::
 
 Multiple alternative timestamp formats are available:
 
-.. csv-table:: Log time stamp format
+.. csv-table:: Log timestamp format
    :header: "Format", "Description", "Example"
    :widths: 6, 30, 32
 
-- 
2.51.0