Space removed in template literals [Cause identified]

Hi,

Thank you for this very helpful library. I identified a strange bug which affects template literals.

Description

When I minify the following:

function renderReviewElement(result) {
    return `<span>
                ${result.return_rating.rating ? `${result.return_rating.rating}/5` : 'N/A'}
            </span>
            <button class="btn btn-sm likeButton" type="button" title="Like">
                <span class="fa fa-heart fa-lg" aria-hidden="true"></span>
            </button>`;

}

function initializeTinyMCE(form) {
    if (form) {
        activateTooltips(`${returnCSSPath(form)} *[title]`);
    }
}

Here is the ouput by JSMinFilter(js).output():

function renderReviewElement(result){return`<span>
                ${result.return_rating.rating ? `${result.return_rating.rating}/5` : 'N/A'}</span><button class="btn btn-sm likeButton"type="button"title="Like"><span class="fa fa-heart fa-lg"aria-hidden="true"></span></button>`;

}

function initializeTinyMCE(form) {
    if (form) {
        activateTooltips(`${returnCSSPath(form)}*[title]`);}}

As we can see, some expressions are wrongly formatted which can cause JS errors:

<button class="btn btn-sm likeButton" type="button" title="Like"> to <button class="btn btn-sm likeButton"type="button"title="Like"> (no space between attributes)
activateTooltips(`${returnCSSPath(form)} *[title]`); to activateTooltips(`${returnCSSPath(form)}*[title]`); (no spaces after variable)

The culprit

After some investigation, my conclusion is that this line is causing this issue: ${result.return_rating.rating ? ` ${result.return_rating.rating}/5` : 'N/A'}

But why?

Solution 1: changing 'N/A' to 'N'

${result.return_rating.rating ? ` ${result.return_rating.rating}/5` : 'N'} does solve the issue. It seems that the slash / is misinterpreted by the parser.

Solution 2: changing 'N/A' to `N/A`

${result.return_rating.rating ? `${result.return_rating.rating}/5` : `N/A`} works as well. It seems that rJSmin requires us to use the same quote character in the ternary operator (in this situation, the backtick character `).

Conclusion

Please let me know what I can do to help. Should we write additional tests? Can this bug be fixed as per the current implementation?

ndparker / rjsmin