Multi-line args descriptions are not indented correctly

[jethrokuan]

Here's an example that illustrates the issue.

def foo(baz=1):
    """

    Args:
      baz: long-description breaking into multiple
        lines (Default value = 1)

    Returns:

    """
    pass

Formatting under google style results in:

def foo(baz=1):
    """

    Args:
      baz: long-description breaking into multiple
    lines (Default value = 1)

    Returns:

    """
    pass

where the second line of the arg description is indented incorrectly.

[introt]

~Same problem with rst, the subsequent lines have the same indentation as the field while they should be indented: https://docutils.sourceforge.io/docs/ref/rst/restructuredtext.html#field-lists~

Edit: 0.4.0dev indents the lines correctly under rst style