php/tests/proto/test_special_characters.proto

syntax = "proto3";

package foo;

message TestSpecialCharacters {
  // test special characters (shouldn't escape): ;,/?:&=+$-_.!~*'()
  // test open comment (shouldn't escape): /*
  // test close comment (should escape): */
  // test at-sign (should escape): @foo
  // test forward slash as first character on a newline:
  ///
  string a = 1;

  ///
  // test forward slash as first character on first line
  string b = 2;
}