Fix small typo and remove traling spaces at PoW docs
@@ -231,14 +231,7 @@ requirement but gives a strong advantage to big miners. In such a setup, small m
every time while larger miners can move on as soon as they find a solution. So in order to keep mining relatively progress-free,
a POW that requires multiple solution attempts with each attempt taking a relatively small amount of time is desirable.
-Following from the this, Grin's progress-freeness is due to the fact that a solution to a Cuckoo with Grin's default parameters
+Following from this, Grin's progress-freeness is due to the fact that a solution to a Cuckoo with Grin's default parameters
can typically be found in under a second on most GPUs, and there is the additional requirement of the Blake2b difficulty check
on top of that. Members of a pool are thus able to prove they're working on a solution to a block by submitting valid Cuckoo solutions
(or a small bundle of them) that simply fall under the current network target difficulty.
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