remove switch test for null/undefined and replace it with a tagged template literal

[Yamboy1]

instead of checking for null/undefined with a switch statement like we are now:

switch(v[1]) {
    case undefined:
    case null:
     return `<${tagname}>${c[1]}</${tagname}>`;
     break;
    default:
     return `<${tagname} ${v[1]}>${c[1]}</${tagname}>`;
     break;
   }

we can replace it with a tagged template literal, which will convert any undefineds or nulls into empty strings. It would then be just a single line:

return stripEmpty`<${tagname} ${v[1]}>${c[1]}</${tagname}>`;

Note: I have already made this function/tag, and I know that it works

[Yamboy1]

more information on tagged templates: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals#Tagged_templates

[Yamboy1]

Im almost finished inplementing this 😃

[Noah Trupin]

Thank you.