Make sleep interval log display more readable

[singhpratyush]

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Make sleep interval log more readable

As of now, the log is like -

[download] Sleeping 14.393324791937204 seconds...

It would become more readable if its something like

[download] Sleeping 14.39 seconds...

I have fixed it here. If valid, shall I create a PR?

[yan12125]

The idea is good. But for integers, it shouldn't add extra '.00'

[singhpratyush]

Made changes here.

[yan12125]

@singhpratyush Could you open a pull request? That makes discussions easier.

[singhpratyush]

Sure.