A Function.tag proposal?

[Andrea Giammarchi]

This is something somehow bothering developers and tools, sooner or later,
the need for a no-op template literal tag function that just returns the
string as is.

The current workaround to have highlights, proper content minification,
etc, is the following one:

```js

import css from 'dummy-tag';import html from 'dummy-tag';
const style = css`  body {    color: green;  }`;
const node = html`  <div>hello world</div>`;

```

but as irrelevant as the dummy-tag code is, in size, it's a dependency, and
a function that can't get easily optimized, due the nature of the tag
signature.

### Proposal

Provide a static `Function.tag` which internally flattens out any template
literal content.

```js

const css = Function.tag;
const html = Function.tag;

const style = css`  body {    color: green;  }`;
const node = html`  <div>hello world</div>`;

```

Internally it will place eventual interpolations within template chunks,
and return a string.

```js
Function.tag`1${2}3` === '123';
```

That's it. Thoughts?

Best Regards
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