[Python-ideas] PEP8 dictionary indenting addition

[Jelte Fennema]

I have an idea to improve indenting guidelines for dictionaries for better
readability: If a value in a dictionary literal is placed on a new line, it
should have (or at least be allowed to have) a n additional hanging indent.

Below is an example:

mydict = {'mykey':
              'a very very very very very long value',
          'secondkey': 'a short value',
          'thirdkey': 'a very very very '
              'long value that continues on the next line',
}


As opposed to this IMHO much less readable version:

mydict = {'mykey':
          'a very very very very very long value',
          'secondkey': 'a short value',
          'thirdkey': 'a very very very '
          'long value that continues on the next line',
}

As you can see it is much harder in the second version to distinguish
between keys and values.
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