Javascript replace what does this line replace

Simple question for you guys.

What does this line replace?

.replace(/ /g,'+开发者_如何学Go')

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Replaces every real space with a plus character.

"Simple question for you guys.".replace(/ /g,'+');  // "Simple+question+for+you+guys."

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Replace spaces with +'s - Looks like some primitive URL-encoding?