Typo fixes in proposal

Co-authored-by: r3econ <[email protected]>

Author: phausler

Evolution/NNNN-share.md

@@ -38,7 +38,7 @@ The buffer internally to the share algorithm will only extend back to the furthe
 
 ## Runtime Behavior
 
-The runtime behaviors fall into a few categories; ordering, iteration isolation, cancellation, and lifetimes. To understand the beahviors there are a terms useful to define. Each creation of the AsyncIterator of the sequence and invocation of next will be referred to a side of the share iteration. The back pressure to the system to fetch a new element or termination is refered to as demand. The limit which is the pending gate for awaiting until the buffer has been serviced used for the `AsyncBufferSequencePolicy.bounded(_ : Int)` policy. The last special definition is that of the extent which is specifically in this case the lifetime of the asynchronous sequence itself.
+The runtime behaviors fall into a few categories; ordering, iteration isolation, cancellation, and lifetimes. To understand the behaviors there are terms useful to define. Each creation of the AsyncIterator of the sequence and invocation of next will be referred to a side of the share iteration. The back pressure to the system to fetch a new element or termination is referred to as demand. The limit which is the pending gate for awaiting until the buffer has been serviced used for the `AsyncBufferSequencePolicy.bounded(_ : Int)` policy. The last special definition is that of the extent which is specifically in this case the lifetime of the asynchronous sequence itself.
 
 When the underlying type backing the share algorithm is constructed a new extent is created; this is used for tracking the reference lifetime under the hood and is used to both house the iteration but also to identify the point at which no more sides can be constructed. When no more sides can be constructed and no sides are left to iterate then the backing iteration is canceled. This prevents any un-referenced task backing the iteration to not be leaked by the algorith itself.