Fix WIT examples to not use i32

Author: mkatychev

design/mvp/Async.md

@@ -295,7 +295,7 @@ in popular source language features/libraries. Often, "Structured Concurrency"
 refers to an invariant that all "child" tasks finish or are cancelled before a
 "parent" task completes. However, the Component Model doesn't force subtasks to
 [return](#returning) or be cancelled before the supertask returns (this is left
-as an option to particular source langauges to enforce or not). The reason for
+as an option to particular source languages to enforce or not). The reason for
 not enforcing a stricter form of Structured Concurrency at the Component
 Model level is that there are important use cases where forcing a supertask to
 stay resident simply to wait for a subtask to finish would waste resources

design/mvp/Explainer.md

@@ -2463,7 +2463,7 @@ something more idiomatic to the language. For example, the `plainname`
 nested inside a class `MyResource`. To unburden bindings generators from having
 to consider pathological cases where two unique-in-the-component names get
 mapped to the same source-language identifier, Component Model validation
-imposes a stronger form of uniquness than simple string equality on all the
+imposes a stronger form of uniqueness than simple string equality on all the
 names that appear within the same scope.
 
 To determine whether two names (defined as sequences of [Unicode Scalar

design/mvp/WIT.md

@@ -1055,7 +1055,7 @@ interface calc {
     }
 
     @since(version = 0.1.0)
-    add: func(x: i32, y: i32) -> result<i32, calc-error>;
+    add: func(x: s32, y: s32) -> result<s32, calc-error>;
 }
 ```
 
@@ -1074,13 +1074,13 @@ interface calc {
     }
 
     @since(version = 0.1.0)
-    add: func(x: i32, y: i32) -> result<i32, calc-error>;
+    add: func(x: s32, y: s32) -> result<s32, calc-error>;
 
     /// By convention, feature flags should be prefixed with package name to reduce chance of collisions
     ///
     /// see: https://github.com/WebAssembly/WASI/blob/main/Contributing.md#filing-changes-to-existing-phase-3-proposals
     @unstable(feature = fgates-calc-minus)
-    sub: func(x: i32, y: i32) -> result<i32, calc-error>;
+    sub: func(x: s32, y: s32) -> result<s32, calc-error>;
 }
 ```
 
@@ -1103,10 +1103,10 @@ interface calc {
     }
 
     @since(version = 0.1.0)
-    add: func(x: i32, y: i32) -> result<i32, calc-error>;
+    add: func(x: s32, y: s32) -> result<s32, calc-error>;
 
     @since(version = 0.1.2)
-    sub: func(x: i32, y: i32) -> result<i32, calc-error>;
+    sub: func(x: s32, y: s32) -> result<s32, calc-error>;
 }
 ```
 
@@ -1129,10 +1129,10 @@ interface calc {
     }
 
     @since(version = 0.1.0)
-    add-one: func(x: i32) -> result<i32, calc-error>;
+    add-one: func(x: s32) -> result<s32, calc-error>;
 
     @since(version = 0.1.1)
-    add: func(x: i32, y: i32) -> result<i32, calc-error>;
+    add: func(x: s32, y: s32) -> result<s32, calc-error>;
 }
 ```
 
@@ -1151,10 +1151,10 @@ interface calc {
     }
 
     @deprecated(version = 0.1.2)
-    add-one: func(x: i32) -> result<i32, calc-error>;
+    add-one: func(x: s32) -> result<s32, calc-error>;
 
     @since(version = 0.1.1)
-    add: func(x: i32, y: i32) -> result<i32, calc-error>;
+    add: func(x: s32, y: s32) -> result<s32, calc-error>;
 }
 ```
 
@@ -1175,7 +1175,7 @@ interface calc {
     }
 
     @since(version = 0.1.1)
-    add: func(x: i32, y: i32) -> result<i32, calc-error>;
+    add: func(x: s32, y: s32) -> result<s32, calc-error>;
 }
 ```