When using abcweb-1.js and snd-1.js in a web page, ABC won't get parsed when there is a space after the "X:". From reading the spec, there is nothing to indicate that this should work, so this might be correct and according to spec.

But a lot of ABC exists which has a space after the "X:", so fixing it would be helpful for those files that are not according the spec.

For example, this code...

X: 3
T:Test 3
K:C
z8|

... will appear as written here and there won't be any SVG.

Fixed by commit [7a28f96ba5].
Thanks.

Editing to show this ticket status as Closed and the Resolution as Fixed, as the description indicates it was fixed in January 2021