Exercise List bugged with git for windows

[milamer]

Running git 2.28.0.windows.1. Tested with cmd, powershell and git bash.

Somehow the --format option does not remove the ' character.

Original code:

const branches = spawnSync(
    `git for-each-ref --format='%(refname:short)'`,
  ).split('\n')

If this also works on linux/mac, a good fix would be to replace ' with ":

const branches = spawnSync(
    `git for-each-ref --format="%(refname:short)"`,
  ).split('\n')

If that does not work an alternative would be to remove ' if present:

const branches = spawnSync(`git for-each-ref --format='%(refname:short)'`)
    .split('\n')
    .map(b => b.replace(/(^')|('$)/g, ''))