```ruby
cask 'polar-websync' do
  version '2.8.2'
  sha256 '287230ee323cca9887f31e448cbac759c770448e25c31c164b87f69bb3ead9b9'

  url "https://www.polarpersonaltrainer.com/downloads/websync_#{version}.dmg"
  name 'Polar WebSync Software'
  homepage 'https://www.polar.com/us-en/support/downloads/Polar_WebSync_Software'
  license :closed

  # cannot be installed automatically, because it presents a choice
  # See more: https://github.com/caskroom/homebrew-cask/pull/11040#issuecomment-100454926
  installer manual: 'Polar WebSync.pkg'

  uninstall pkgutil: 'fi.polar.websync.pkg',
            quit:    'fi.polar.WebSync',
            delete:  '/Applications/WebSync.app'
end
```

Fix `url` stanza comment for Polar WebSync Software.
user
```ruby
cask 'polar-websync' do
  version '2.8.2'
  sha256 '287230ee323cca9887f31e448cbac759c770448e25c31c164b87f69bb3ead9b9'

  # polarpersonaltrainer.com was verified as official when first introduced to the cask
  url "https://www.polarpersonaltrainer.com/downloads/websync_#{version}.dmg"
  name 'Polar WebSync Software'
  homepage 'https://www.polar.com/us-en/support/downloads/Polar_WebSync_Software'
  license :closed

  # cannot be installed automatically, because it presents a choice
  # See more: https://github.com/caskroom/homebrew-cask/pull/11040#issuecomment-100454926
  installer manual: 'Polar WebSync.pkg'

  uninstall pkgutil: 'fi.polar.websync.pkg',
            quit:    'fi.polar.WebSync',
            delete:  '/Applications/WebSync.app'
end
```
assistant