rm 'That: ' from That and ThatNot asserter functions

Author: lainio

assert/assert.go

@@ -268,7 +268,7 @@ func NotImplemented(a ...any) {
 // single 'if-statement' that is almost nothing.
 func ThatNot(term bool, a ...any) {
 	if term {
-		defMsg := "ThatNot: " + assertionMsg
+		defMsg := assertionMsg
 		Default().reportAssertionFault(defMsg, a)
 	}
 }
@@ -278,7 +278,7 @@ func ThatNot(term bool, a ...any) {
 // single 'if-statement' that is almost nothing.
 func That(term bool, a ...any) {
 	if !term {
-		defMsg := "That: " + assertionMsg
+		defMsg := assertionMsg
 		Default().reportAssertionFault(defMsg, a)
 	}
 }

assert/assert_test.go

@@ -18,7 +18,7 @@ func ExampleThat() {
 	}
 	err := sample()
 	fmt.Printf("%v", err)
-	// Output: testing: run example: assert_test.go:16: ExampleThat.func1(): That: assertion violation: optional message
+	// Output: testing: run example: assert_test.go:16: ExampleThat.func1(): assertion violation: optional message
 }
 
 func ExampleNotNil() {