cpufreq: editing corrections to cpufreq.rst

Change a few words and abbreviations/punctuation.

Change one echo command to include a trailing '`'.

Signed-off-by: Randy Dunlap <[e-mail]>
Cc: Rafael J. Wysocki <[e-mail]>
Cc: Viresh Kumar <[e-mail]>
Cc: [e-mail]
Cc: Jonathan Corbet <[e-mail]>
Signed-off-by: Jonathan Corbet <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

Documentation/admin-guide/pm/cpufreq.rst

···
 	present).
 
 	The existence of the limit may be a result of some (often unintentional)
-	BIOS settings, restrictions coming from a service processor or another
+	BIOS settings, restrictions coming from a service processor or other
 	BIOS/HW-based mechanisms.
 
 	This does not cover ACPI thermal limitations which can be discovered
···
         extension on ARM). If one cannot be determined, this attribute should
         not be present.
 
-        Note, that failed attempt to retrieve current frequency for a given
-        CPU(s) will result in an appropriate error, i.e: EAGAIN for CPU that
+        Note that failed attempt to retrieve current frequency for a given
+        CPU(s) will result in an appropriate error, i.e.: EAGAIN for CPU that
         remains idle (raised on ARM).
 
 ``cpuinfo_max_freq``
···
 	represented by it to be 1.5 times as high as the transition latency
 	(the default)::
 
-	# echo `$(($(cat cpuinfo_transition_latency) * 3 / 2)) > ondemand/sampling_rate
+	# echo `$(($(cat cpuinfo_transition_latency) * 3 / 2))` > ondemand/sampling_rate
 
 ``up_threshold``
 	If the estimated CPU load is above this value (in percent), the governor