message: Add a macro expansion with multiple parameters.
  Testing a slightly more complex macro expansion.
diff: @@ -32,6 +32,7 @@ TEST(PreprocessTest, BasicPp) {
  std::string res = harness.preprocess("module top(); endmodule");
  EXPECT_EQ(res, "module top(); endmodule");
  }
  +
  {
  std::string res = harness.preprocess(
  "`define FOO(a) a*2\n\n\
  @@ -44,6 +45,19 @@ TEST(PreprocessTest, BasicPp) {
  assign b = c*2;\n\
  endmodule");
  }
  +
  + {
  + std::string res = harness.preprocess(
  + "`define BAR(a, b) (a)*2+(b)\n\n\
  + module top();\n\
  + assign b = `BAR(3 * c, 2*d);\n\
  + endmodule");
  + EXPECT_EQ(res,
  + "\n\
  + module top();\n\
  + assign b = (3 * c)*2+(2*d);\n\
  + endmodule");
  + }
  }
  } // namespace
  } // namespace SURELOG
  