What's better in the end of each period? Two spaces or one?

[BlackHatCoiner]

I was wondering, what do you think it's better for readability?

This is an example. With one space. Do you like it?

This is an example.  With two spaces.  How about that?

[DeathAngel]

I am far from a grammatical wizard but I think one space looks better. Two looks kinda dumb, imo.

[CryptoWebDirectory]

I agree that two spaces looks pretty dumb and you're getting away from the grammar everyone is taught. Here in America we're taught to use one space after each word, comma or period. I'm also no English major or grammatical expert, but I'd say it's better (and more proper) to just use one space.