switch to using a raw string

src/substrait/textplan/converter/tests/BinaryToTextPlanConversionTest.cpp

@@ -608,40 +608,40 @@ std::vector<TestCase> getTestCases() {
  measures { measure { output_type { i32 {} } arguments { value { selection { direct_reference { struct_field { field: 0 } } } } } } }
  } } } })",
  AllOf(WhenSerialized(EqSquashingWhitespace(
- "pipelines {\n"
- " read -> aggregate -> root;\n"
- "}\n"
- "\n"
- "read relation read {\n"
- " source local;\n"
- " base_schema schema;\n"
- "}\n"
- "\n"
- "aggregate relation aggregate {\n"
- " measure {\n"
- " measure sum(schema.b)->i32@AGGREGATION_PHASE_UNSPECIFIED NAMED measurename;\n"
- " }\n"
- " measure {\n"
- " measure sum(schema.a)->i32@AGGREGATION_PHASE_UNSPECIFIED NAMED measurename2;\n"
- " }\n"
- "\n"
- " emit measurename2;\n"
- "}\n"
- "\n"
- "schema schema {\n"
- " a string;\n"
- " b i32;\n"
- "}\n"
- "\n"
- "source local_files local {\n"
- " items = [\n"
- " {uri_file: \"x.parquet\" parquet: {}}\n"
- " ]\n"
- "}\n"
- "\n"
- "extension_space {\n"
- " function sum:i32 as sum;\n"
- "}\n"))),
+ R"(pipelines {
+ read -> aggregate -> root;
+ }
+
+ read relation read {
+ source local;
+ base_schema schema;
+ }
+
+ aggregate relation aggregate {
+ measure {
+ measure sum(schema.b)->i32@AGGREGATION_PHASE_UNSPECIFIED NAMED measurename;
+ }
+ measure {
+ measure sum(schema.a)->i32@AGGREGATION_PHASE_UNSPECIFIED NAMED measurename2;
+ }
+
+ emit measurename2;
+ }
+
+ schema schema {
+ a string;
+ b i32;
+ }
+
+ source local_files local {
+ items = [
+ {uri_file: "x.parquet" parquet: {}}
+ ]
+ }
+
+ extension_space {
+ function sum:i32 as sum;
+ )"))),
  },
  };
  return cases;