touch: support multiple arguments (#2386)

Fixes #2384

crates/nu-cli/tests/commands/touch.rs

@@ -10,7 +10,22 @@ fn creates_a_file_when_it_doesnt_exist() {
         );
 
         let path = dirs.test().join("i_will_be_created.txt");
-
         assert!(path.exists());
     })
 }
+
+#[test]
+fn creates_two_files() {
+    Playground::setup("create_test_2", |dirs, _sandbox| {
+        nu!(
+            cwd: dirs.test(),
+            "touch a b"
+        );
+
+        let path = dirs.test().join("a");
+        assert!(path.exists());
+
+        let path2 = dirs.test().join("b");
+        assert!(path2.exists());
+    })
+}