Ignoring branches requires comments unnaturally positioned outside `{`…`}`

[andersk]

In order to mark an if or else branch as ignored, the /* v8 ignore start */…/* v8 ignore stop */ comments currently need to be positioned outside the {…}, which is awkward (especially when formatting with Prettier):

if (false /* v8 ignore start */) {
  console.log("uncovered");
} /* v8 ignore stop */ else {
  console.log("covered");
}

if (true) {
  console.log("covered");
} /* v8 ignore start */ else {
  console.log("uncovered");
} /* v8 ignore stop */

It would be nicer if the else, {, and } tokens were automatically considered part of the ignored range if the statements inside are ignored, and the comments could be placed more naturally:

if (false) {
  /* v8 ignore start */
  console.log("uncovered");
  /* v8 ignore stop */
} else {
  console.log("covered");
}

if (true) {
  console.log("covered");
} else {
  /* v8 ignore start */
  console.log("uncovered");
  /* v8 ignore stop */
}