[NFC][test] Minor corrections on test messages

Author: LucianoPAlmeida

lib/SILOptimizer/FunctionSignatureTransforms/ExistentialTransform.cpp

@@ -573,7 +573,7 @@ void ExistentialTransform::populateThunkBody() {
     //     copy_addr %valAdr to %temp // <== Temp CopyAddr
     //     apply(%temp)               // <== Temp is consumed by the apply
     //
-    // Destroy the original arument and deallocation the temporary:
+    // Destroy the original argument and deallocation the temporary:
     //     destroy_addr %consumedExistential : $*Protocol
     //     dealloc_stack %temp : $*T
     if (Temp.DestroyValue)

test/Parse/pointer_conversion.swift.gyb

@@ -164,7 +164,7 @@ func constPointerArguments(_ p: UnsafeMutablePointer<Int>,
   takesConstPointer([0, 1, 2])
   // <rdar://problem/22308330> QoI: CSDiags doesn't handle array -> pointer impl conversions well
   takesConstPointer([0.0, 1.0, 2.0])
-  // expected-error@-1 3 {{annot convert value of type 'Double' to expected element type 'Int'}}
+  // expected-error@-1 3 {{cannot convert value of type 'Double' to expected element type 'Int'}}
 
   // We don't allow these conversions outside of function arguments.
   var x: UnsafePointer<Int> = &i // expected-error {{use of extraneous '&'}}

validation-test/compiler_crashers_2_fixed/0186-rdar46497155.swift

@@ -22,7 +22,7 @@ func foo(arr: [E], other: P) -> Bool {
   return arr.compactMap { i in
     var flag = false
     return try? i.getB(&flag)
-  }.compactMap { u -> P? in // expected-error {{nable to infer type of a closure parameter 'u' in the current context}}
+  }.compactMap { u -> P? in // expected-error {{unable to infer type of a closure parameter 'u' in the current context}}
     guard let a = try? u.foo() else { return nil }
     return a.value!
   }.contains {