“Title with dot after question mark?.”: delimiter and suffix, guard against repeated chars

[glorieux-f]

• [x] I read the README and followed the instructions.
• [x] I am sure that the used CSL metadata follows the CSL schema.
• [x] I use a valid CSL stylesheet

Bug reports:

citeproc-php

• Doe, J. (n.d.). Title with dot after question mark?.
• Doe, J. (n.d.). Title with dot delimiter after question mark?. Publisher.

zotero

• Doe, J. (n.d.). Title with dot suffix after question mark?
• Doe, J. (n.d.-a). Title with dot delimiter after question mark? Publisher.

Fix ?

• https://github.com/seboettg/citeproc-php/blob/116b470c80940baabc04aec962d0ad5e4360c6fc/src/Util/StringHelper.php#L174
• https://github.com/seboettg/citeproc-php/blob/116b470c80940baabc04aec962d0ad5e4360c6fc/src/Styles/AffixesTrait.php#L65

Used CSL stylesheet:

apa.csl

Used CSL metadata

Please replace these lines with your used metadata, for instance:

[
{
    "id": "http://zotero.org/users/8989645/items/T3B6BM9U",
    "type": "book",
    "title": "Title with dot suffix after question mark?",
    "author": [
        {
            "family": "Doe",
            "given": "John"
        }
    ]
},
{
    "id": "n2",
    "type": "book",
    "publisher": "Publisher",
    "title": "Title with dot delimiter after question mark?",
    "author": [
        {
            "family": "Doe",
            "given": "John"
        }
    ]
}
]