rename(std/testing): rename assert*Contains to assert*Includes (#7951)

This commit renames two assertion functions to better align with JS API:
- assertStringContains -> assertStringIncludes
- assertArrayContains -> assertArrayIncludes

std/testing/asserts.ts

@@ -330,10 +330,10 @@ export function assertNotStrictEquals(
 }
 
 /**
- * Make an assertion that actual contains expected. If not
+ * Make an assertion that actual includes expected. If not
  * then thrown.
  */
-export function assertStringContains(
+export function assertStringIncludes(
   actual: string,
   expected: string,
   msg?: string,
@@ -347,26 +347,26 @@ export function assertStringContains(
 }
 
 /**
- * Make an assertion that `actual` contains the `expected` values.
+ * Make an assertion that `actual` includes the `expected` values.
  * If not then an error will be thrown.
  *
  * Type parameter can be specified to ensure values under comparison have the same type.
  * For example:
  *```ts
- *assertArrayContains<number>([1, 2], [2])
+ *assertArrayIncludes<number>([1, 2], [2])
  *```
  */
-export function assertArrayContains(
+export function assertArrayIncludes(
   actual: ArrayLike<unknown>,
   expected: ArrayLike<unknown>,
   msg?: string,
 ): void;
-export function assertArrayContains<T>(
+export function assertArrayIncludes<T>(
   actual: ArrayLike<T>,
   expected: ArrayLike<T>,
   msg?: string,
 ): void;
-export function assertArrayContains(
+export function assertArrayIncludes(
   actual: ArrayLike<unknown>,
   expected: ArrayLike<unknown>,
   msg?: string,
@@ -388,7 +388,7 @@ export function assertArrayContains(
     return;
   }
   if (!msg) {
-    msg = `actual: "${_format(actual)}" expected to contain: "${
+    msg = `actual: "${_format(actual)}" expected to include: "${
       _format(expected)
     }"\nmissing: ${_format(missing)}`;
   }