Example:
The WHO was founded in 1948.
I see double lines in Firefox 57, Opera 49 / Chrome 62. Internet Explorer / Edge is not affected.
Where find line dotted:
/* from normalize.scss */
abbr[title] {
border-bottom: 1px dotted;
}
/* from browser default stylesheet (user agent stylesheet) */
abbr[title], acronym[title] {
text-decoration: underline dotted;
}
Maybe disable default css in abbr element (text-decoration: none !important
) for better look.