Use $train->type rather than firts part of $train->line for CSS class

In some cases (e.g. in Belgium), trains do not have a type, so the first part
of $train->line is the train number instead.

templates/_connections.html.ep

@@ -36,7 +36,7 @@
 				% if ($train->platform) {
 					<span>Gleis <%= $train->platform %></span>
 				% }
-				<span class="dep-line <%= (split(/ /, $train->line))[0] %>">
+				<span class="dep-line <%= $train->type // q{} %>">
 					%= $train->line
 				</span>
 			</span>

templates/_connections_hafas.html.ep

@@ -36,7 +36,7 @@
 				% if ($train->platform) {
 					<span>Gleis <%= $train->platform %></span>
 				% }
-				<span class="dep-line <%= (split(/ /, $train->line))[0] %>">
+				<span class="dep-line <%= $train->type // q{} %>">
 					%= $train->line
 				</span>
 			</span>

templates/_departures_hafas.html.ep

@@ -31,7 +31,7 @@
 				<i class="material-icons" aria-label="Keine Echtzeitdaten vorhanden" style="font-size: 16px;">gps_off</i>
 			% }
 		</a>
-		<span class="dep-line <%= (split(/ /, $result->line))[0] %>">
+		<span class="dep-line <%= $result->type // q{} %>">
 			%= $result->line
 		</span>
 		<span class="dep-dest">

templates/_departures_iris.html.ep

@@ -36,7 +36,7 @@
 				<i class="material-icons" aria-label="Keine Echtzeitdaten vorhanden" style="font-size: 16px;">gps_off</i>
 			% }
 			</a>
-			<span class="dep-line <%= (split(/ /, $result->line))[0] %>">
+			<span class="dep-line <%= $result->type // q{} %>">
 				%= $result->line
 			</span>
 			<span class="dep-dest">