fix implicit concatenated strings (#10666)

Author: skshetry

tests/func/test_merge_driver.py

@@ -132,7 +132,8 @@ def test_merge_different_output_options(tmp_dir, dvc, caplog):
     )
 
     (tmp_dir / "their").write_text(
-        r"outs:\n"
+        r"outs:"
+        "\n"
         "- md5: f987654321.dir\n"
         "  hash: md5\n"
         "  path: path\n"

tests/unit/command/test_dataset.py

@@ -106,7 +106,8 @@ def test_add_already_exists(dvc, caplog, mocker):
                 "missing": "Updating mydataset (s3://bucket/path)\n",
                 "unchanged": "Nothing to update\n",
                 "updated": (
-                    r"Updating mydataset (s3://bucket/path)\n"
+                    r"Updating mydataset (s3://bucket/path)"
+                    "\n"
                     "M\tbaz\n"
                     "A\tfoobar\n"
                     "D\tfoo\n"