Formats docstrings to follow Python PEP 257 (Python 3)

 Docformatter currently automatically formats docstrings to follow a subset
 of the PEP 257 conventions.
 .
 Below are the relevant items quoted from PEP 257:
 .
  * For consistency, always use triple double quotes around docstrings,
  * Triple quotes are used even though the string fits on one line,
  * Multi-line docstrings consist of a summary line just like a one-line
    docstring, followed by a blank line, followed by a more elaborate
    description,
  * Unless the entire docstring fits on a line, place the closing quotes on
    a line by themselves.
 .
 Docformatter also handles some of the PEP 8 conventions:
 .
   * Don't write string literals that rely on significant trailing whitespace
     Such trailing whitespace is visually indistinguishable and some editors
     (or more recently, reindent.py) will trim them.
 .
 This package installs the library for Python 3.