Attributes: Trim whitespace from option text when returned as a value

Fixes #14858
Ref #14686
Closes gh-1531

src/attributes/val.js

@@ -74,7 +74,9 @@ jQuery.extend({
 				var val = jQuery.find.attr( elem, "value" );
 				return val != null ?
 					val :
-					jQuery.text( elem );
+					// Support: IE10-11+
+					// option.text throws exceptions (#14686, #14858)
+					jQuery.trim( jQuery.text( elem ) );
 			}
 		},
 		select: {