Editing Template:Flatlist/styles.css

/**
 * Style for horizontal lists (separator following item).
 * @source https://www.mediawiki.org/wiki/Snippets/Horizontal_lists
 * @revision 9 (2016-08-10)
 * @author [[User:Edokter]]
 */
.hlist dl,
.hlist ol,
.hlist ul {
	margin: 0;
	padding: 0;
}

/* Display list items inline */
.hlist dd,
.hlist dt,
.hlist li {
	/* don't trust the note that says margin doesn't work with inline
	 * removing margin: 0 makes dds have margins again */
	margin: 0;
	display: inline;
}

/* Display nested lists inline */
/*
We remove .inline since it's not used here.
.hlist.inline,
.hlist.inline dl,
.hlist.inline ol,
.hlist.inline ul,
*/
.hlist dl dl, .hlist dl ol, .hlist dl ul,
.hlist ol dl, .hlist ol ol, .hlist ol ul,
.hlist ul dl, .hlist ul ol, .hlist ul ul {
	display: inline;
}

/* Hide empty list items */
.hlist .mw-empty-li,
.hlist .mw-empty-elt {
	display: none;
}

/* Generate interpuncts */
.hlist dt:after {
	content: ": ";
}

.hlist dd:after,
.hlist li:after {
	content: " · ";
	font-weight: bold;
}

.hlist dd:last-child:after,
.hlist dt:last-child:after,
.hlist li:last-child:after {
	content: none;
}

/* Add parentheses around nested lists */
.hlist dd dd:first-child:before, .hlist dd dt:first-child:before, .hlist dd li:first-child:before,
.hlist dt dd:first-child:before, .hlist dt dt:first-child:before, .hlist dt li:first-child:before,
.hlist li dd:first-child:before, .hlist li dt:first-child:before, .hlist li li:first-child:before {
	content: " (";
	font-weight: normal;
}

.hlist dd dd:last-child:after, .hlist dd dt:last-child:after, .hlist dd li:last-child:after,
.hlist dt dd:last-child:after, .hlist dt dt:last-child:after, .hlist dt li:last-child:after,
.hlist li dd:last-child:after, .hlist li dt:last-child:after, .hlist li li:last-child:after {
	content: ")";
	font-weight: normal;
}

/* Put ordinals in front of ordered list items */
.hlist ol {
	counter-reset: listitem;
}

.hlist ol > li {
	counter-increment: listitem;
}

.hlist ol > li:before {
	content: " " counter(listitem) "\a0";
}

.hlist dd ol > li:first-child:before,
.hlist dt ol > li:first-child:before,
.hlist li ol > li:first-child:before {
	content: " (" counter(listitem) "\a0";
}