Options to show sign(+) for positiv numbers

[MaximilianFranke]

It would be nice to have a option that adds a + symbol to positv numbers like:
+1.245,35€

It would be helpfull to format amount changes.

[freearhey]

But isn’t it easier to add a plus sign when displaying the price on the screen, like this:

<span>+{{ price | currency('€') }}</span>

or am I misunderstood?

[MaximilianFranke]

But with an negative amount this would display: +-1.245,35€
Sure i can add a conditional + sign but for me this would be nice to have it as option in the filter.
Like:
<span>{{ 1245,35 | currency('€', {showAddSign: true}) }}</span>
Result: +1.245,35€

But:
<span>{{ -1245,35 | currency('€', {showAddSign: true}) }}</span>
Should be still : -1.245,35€