bird-watcher: Fix typos

exercises/concept/bird-watcher/.docs/hints.md

@@ -20,13 +20,13 @@
 
 - The [`every?`][every?] function can be used to check if all items in a collection satisfy a given predicate.
 
-- The [`pos?`][pos?] predicate returns true if a number is greater than zero.
+- The [`pos?`][pos?] predicate returns `true` if a number is greater than zero.
 
-- The [`not`][not] function returns true if an expression evaluates to logical false.
+- The [`not`][not] function returns `true` if an expression evaluates to logical false.
 
 ## 5. Calculate the number of visiting birds for the first number of days
 
-- The [`take`][take] function can be used return a sequence of the first n items in a collection.
+- The [`take`][take] function can be used to return a sequence of the first n items in a collection.
 
 - The [`reduce`][reduce] function can be used to add a collection of values together.
 
@@ -36,7 +36,7 @@
 
 ## 7.  Check for odd week
 
-- The [`=`][equality] function can be used to test equality.
+- The [`=`][equality] function can be used to test for equality.
 
 [count]: https://clojuredocs.org/clojure.core/count
 [dec]: https://clojuredocs.org/clojure.core/dec

exercises/concept/bird-watcher/.docs/instructions.md

@@ -62,7 +62,7 @@ Implement the `busy-days` function to return the number of busy days:
 
 ## 7. Check for odd week
 
-Over the last year, you've found that some weeks for the same, odd pattern, where the counts alternate between one and zero birds visiting. Implement the `odd-week?` function that returns `true` if the bird count pattern of this week matches the odd pattern:
+Over the last year, you've found that some weeks form the same, odd pattern, where the counts alternate between one and zero birds visiting. Implement the `odd-week?` function that returns `true` if the bird count pattern of this week matches the odd pattern:
 
 ```clojure
 (odd-week? [1 0 1 0 1 0 1])