Running capitalize on a name with multiple suffixes introduces an extra comma

[arusahni]

If I have a name in the format last_name, first_name suffix-list, for example: SAHNI, ARU MD PHD, nameparser produces the following:

<HumanName : [
    Title: ''
    First: 'ARU'
    Middle: ''
    Last: 'SAHNI'
    Suffix: 'MD, PHD'
    Nickname: ''
]>

If I then run capitalize on the name, I get:

<HumanName : [
    Title: ''
    First: 'Aru'
    Middle: ''
    Last: 'Sahni'
    Suffix: 'Md,, Phd'
    Nickname: ''
]>

Notice the extra comma after the "Md" title. This seems to be due to the fact that the suffix_list is being concatenated with a comma, but being split on whitespace in the capitalize function. I'll submit a pull-request for this shortly.