40 columns                              |
>>> indented line comment (dartbug.com/16383)
main() {
  // comment
}
<<<
main() {
  // comment
}
>>> line comment on opening line
main() { // comment
}
<<<
main() {
  // comment
}
>>> indented block comment
main() {
  /* comment */
}
<<<
main() {
  /* comment */
}
>>> block comment with trailing newline
main() {/* comment */
}
<<<
main() {
  /* comment */
}
>>> block comment with leading newline
main() {
  /* comment */}
<<<
main() {
  /* comment */
}
>>> inline block comment
main() {  /* comment */  }
<<<
main() {/* comment */}
>>> multiple comments on opening line
main() { /* first */ // second
}
<<<
main() {
  /* first */ // second
}
>>> multiple inline block comments
main() {  /* 1 */   /* 2 */   /* 3 */  }
<<<
main() {/* 1 */ /* 2 */ /* 3 */}
>>> multiline trailing block comment
main() {  /* comment
*/  }
<<<
main() {
  /* comment
*/
}
>>> line comments at the start of the line in a function
main() {
//  print(1);
//  print(2);
  print(3);
}
<<<
main() {
//  print(1);
//  print(2);
  print(3);
}
>>> before "," in param list
main(a/* c */,b) {}
<<<
main(a /* c */, b) {}
>>> after "," in param list
main(a,/* c */b) {}
<<<
main(a, /* c */ b) {}
>>> before "[" in param list
main(/* c */[arg]) {}
<<<
main(/* c */ [arg]) {}
>>> after "[" in param list
main([/* c */arg]) {}
<<<
main([/* c */ arg]) {}
>>> before "]" in param list
main([arg/* c */]) {}
<<<
main([arg /* c */]) {}
>>> after "]" in param list
main([arg]/* c */) {}
<<<
main([arg] /* c */) {}
>>> before "{" in param list
main(/* c */{arg}) {}
<<<
main(/* c */ {arg}) {}
>>> after "{" in param list
main({/* c */arg}) {}
<<<
main({/* c */ arg}) {}
>>> before "}" in param list
main({arg/* c */}) {}
<<<
main({arg /* c */}) {}
>>> after "{" in param list
main({arg}/* c */) {}
<<<
main({arg} /* c */) {}
>>>
longFunction(/* a very long block comment */) {}
<<<
longFunction(
    /* a very long block comment */) {}
>>> remove blank line before beginning of body
main() {


  // comment
}
<<<
main() {
  // comment
}