chore: update parser tests

plugin/gomark/render/string/string_test.go

@@ -14,17 +14,25 @@ func TestStringRender(t *testing.T) {
 		text     string
 		expected string
 	}{
+		{
+			text:     "",
+			expected: "",
+		},
 		{
 			text:     "Hello world!",
-			expected: `Hello world!`,
+			expected: "Hello world!\n",
 		},
 		{
 			text:     "**Hello** world!",
-			expected: `Hello world!`,
+			expected: "Hello world!\n",
 		},
 		{
 			text:     "**[your/slash](https://example.com)** world!",
-			expected: `your/slash world!`,
+			expected: "your/slash world!\n",
+		},
+		{
+			text:     "Test\n1. Hello\n2. World",
+			expected: "Test\n1. Hello\n2. World\n",
 		},
 	}