Remove newlines in descriptions that span multiple lines

[bkanuka]

I would like to format my docstrings to have a max line length, but these line breaks should not be present after parsing. This is the behaviour of other docstring parsers, as well as markup formats like markdown or rst. A line break should be present if there are 2 newlines.

For example:

from docstring_parser import parse

docstring = """
    short description
    
    Long description that can span multiple lines. This is test sentence 1. This is test sentence 2. I do not want a 
    line break in this sentence.

    Parameters:
        param_1: Description of param_1. This is test sentence 1. This is test sentence 2. This is test sentence 3. I
            do not want a line break in this sentence. 
    """

parsed = parse(docstring)

print("Long description:")
print(repr(parsed.long_description))

print("Parameters:")
for param in parsed.params:
    print(repr(param.description))

gives the output:

Long description:
'Long description that can span multiple lines. This is test sentence 1. This is test sentence 2. I do not want a \nline break in this sentence.'
Parameters:
'Description of param_1. This is test sentence 1. This is test sentence 2. This is test sentence 3. I\ndo not want a line break in this sentence. '

(note that I use repr to make it clear that the newlines are present)