docs: Fix wording in optional zram feature docs

This fixes some simple grammar errors in the documentation for zram,
specifically errors in the optional feature section of the zram
documentation.
Signed-off-by: NEthan Dye <mrtops03@gmail.com>
Link: https://lore.kernel.org/r/20220207235442.95090-1-mrtops03@gmail.comSigned-off-by: NJonathan Corbet <corbet@lwn.net>

Documentation/admin-guide/blockdev/zram.rst

@@ -315,8 +315,8 @@ To use the feature, admin should set up backing device via::
 
 	echo /dev/sda5 > /sys/block/zramX/backing_dev
 
-before disksize setting. It supports only partition at this moment.
-If admin wants to use incompressible page writeback, they could do via::
+before disksize setting. It supports only partitions at this moment.
+If admin wants to use incompressible page writeback, they could do it via::
 
 	echo huge > /sys/block/zramX/writeback
 
@@ -341,9 +341,9 @@ Admin can request writeback of those idle pages at right timing via::
 
 	echo idle > /sys/block/zramX/writeback
 
-With the command, zram writeback idle pages from memory to the storage.
+With the command, zram will writeback idle pages from memory to the storage.
 
-If admin want to write a specific page in zram device to backing device,
+If an admin wants to write a specific page in zram device to the backing device,
 they could write a page index into the interface.
 
 	echo "page_index=1251" > /sys/block/zramX/writeback
@@ -354,7 +354,7 @@ to guarantee storage health for entire product life.
 
 To overcome the concern, zram supports "writeback_limit" feature.
 The "writeback_limit_enable"'s default value is 0 so that it doesn't limit
-any writeback. IOW, if admin wants to apply writeback budget, he should
+any writeback. IOW, if admin wants to apply writeback budget, they should
 enable writeback_limit_enable via::
 
 	$ echo 1 > /sys/block/zramX/writeback_limit_enable
@@ -365,7 +365,7 @@ until admin sets the budget via /sys/block/zramX/writeback_limit.
 (If admin doesn't enable writeback_limit_enable, writeback_limit's value
 assigned via /sys/block/zramX/writeback_limit is meaningless.)
 
-If admin want to limit writeback as per-day 400M, he could do it
+If admin wants to limit writeback as per-day 400M, they could do it
 like below::
 
 	$ MB_SHIFT=20
@@ -375,16 +375,16 @@ like below::
 	$ echo 1 > /sys/block/zram0/writeback_limit_enable
 
 If admins want to allow further write again once the budget is exhausted,
-he could do it like below::
+they could do it like below::
 
 	$ echo $((400<<MB_SHIFT>>4K_SHIFT)) > \
 		/sys/block/zram0/writeback_limit
 
-If admin wants to see remaining writeback budget since last set::
+If an admin wants to see the remaining writeback budget since last set::
 
 	$ cat /sys/block/zramX/writeback_limit
 
-If admin want to disable writeback limit, he could do::
+If an admin wants to disable writeback limit, they could do::
 
 	$ echo 0 > /sys/block/zramX/writeback_limit_enable
 
@@ -393,7 +393,7 @@ system reboot, echo 1 > /sys/block/zramX/reset) so keeping how many of
 writeback happened until you reset the zram to allocate extra writeback
 budget in next setting is user's job.
 
-If admin wants to measure writeback count in a certain period, he could
+If admin wants to measure writeback count in a certain period, they could
 know it via /sys/block/zram0/bd_stat's 3rd column.
 
 memory tracking