test: restore unrelated trailing newlines in cwd/tool-search tests

The salvaged PR incidentally stripped a trailing blank line from two
unrelated test files (test_file_tools_cwd_resolution.py,
test_tool_search.py). Restore them to keep the salvage diff scoped to
the observability feature.

tests/tools/test_file_tools_cwd_resolution.py

@@ -194,3 +194,4 @@ def test_patch_reports_resolved_absolute_path(_isolated_cwd, monkeypatch):
     assert "WORKSPACE_PATCHED" in (workspace / "target.py").read_text()
     # And the decoy copy is untouched.
     assert (decoy / "target.py").read_text() == "DECOY_ORIGINAL\n"
+

tests/tools/test_tool_search.py

@@ -535,3 +535,4 @@ class TestRegression_ToolsetScoping:
         assert "mcp_helper_op" in names
         # core tools are never deferrable
         assert "terminal" not in names
+