Allows admin announcements to have newlines

code/__HELPERS/text.dm

@@ -323,7 +323,7 @@ proc/checkhtml(var/t)
 //This proc strips html properly, but it's not lazy like the other procs.
 //This means that it doesn't just remove < and > and call it a day.
 //Also limit the size of the input, if specified.
-/proc/strip_html_properly(var/input, var/max_length = MAX_MESSAGE_LEN)
+/proc/strip_html_properly(var/input, var/max_length = MAX_MESSAGE_LEN, allow_lines = 0)
 	if(!input)
 		return
 	var/opentag = 1 //These store the position of < and > respectively.
@@ -345,10 +345,10 @@ proc/checkhtml(var/t)
 			break
 	if(max_length)
 		input = copytext(input,1,max_length)
-	return sanitize(input)
+	return sanitize(input, allow_lines ? list("\t" = " ") : list("\n" = " ", "\t" = " "))
 
-/proc/trim_strip_html_properly(var/input, var/max_length = MAX_MESSAGE_LEN)
-    return trim(strip_html_properly(input, max_length))
+/proc/trim_strip_html_properly(var/input, var/max_length = MAX_MESSAGE_LEN, allow_lines = 0)
+    return trim(strip_html_properly(input, max_length, allow_lines))
 
 //Used in preferences' SetFlavorText and human's set_flavor verb
 //Previews a string of len or less length

code/defines/procs/announce.dm

@@ -51,7 +51,7 @@
 	var/tmp/message_sound = new_sound ? sound(new_sound) : sound
 
 	if(!msg_sanitized)
-		message = trim_strip_html_properly(message)
+		message = trim_strip_html_properly(message, allow_lines = 1)
 	message_title = html_encode(message_title)
 
 	Message(message, message_title, from)