Typo fixes (#251)

* Removes duplicated word in case study readMe

* Typo fix

Author: alskipp

Examples/CaseStudies/SwiftUICaseStudies/01-GettingStarted-AlertsAndActionSheets.swift

@@ -15,7 +15,7 @@ private let readMe = """
   closures.
 
   The benefit of doing this is that you can get full test coverage on how a user interacts with \
-  with alerts and action sheets in your application
+  alerts and action sheets in your application
   """
 
 struct AlertAndSheetState: Equatable {

Examples/CaseStudies/SwiftUICaseStudies/01-GettingStarted-SharedState.swift

@@ -221,8 +221,8 @@ struct SharedStateProfileView: View {
             This tab shows state from the previous tab, and it is capable of reseting all of the \
             state back to 0.
 
-            This shows that it is possible to for each screen to model its state in the way that \
-            makes the most sense for it, while still allowing the state and mutations to be shared \
+            This shows that it is possible for each screen to model its state in the way that makes \
+            the most sense for it, while still allowing the state and mutations to be shared \
             across independent screens.
             """,
           .caption