bug 2: Periods that follow @user.sitename.tld or @user.sitename disappear

[jesse_the_k]

Periods that follow user or [Bad username or site: user @ sitename] disappear

In two cases a following period disappears

• fully qualified with user.sitename.tld
• when tld is assumed user.sitename

user.sitename.tld

• period user.
• backslash period user.
• paren (user)
• hyphen -[Bad username or site: user @ archiveofourown.org-]
• bang user!
• question user?
• slash period user/.
• backslash period user.

user.abbrev.tld

• period user.
• backslash period user.
• paren (user)
• hyphen -[Bad username or site: user @ ao3.org-]
• bang user!
• question user?
• slash period user/.
• backslash period user.

Only in Markdown, backslash before period escapes the error

user.sitename

• period user.
• backslash period user.
• paren (user)
• hyphen -[Bad username or site: user @ archiveofourown-]
• bang user!
• question user?
• slash period user/.
• backslash period user.

user.abbrev

• period user.
• backslash period user.
• paren (user)
• hyphen -[Bad username or site: user @ ao3-]
• bang user!
• question user?
• slash period user/.
• backslash period user.