Fix closing brackets

[olegklimov]

It's important to delete spaces before asking the model, because there should be a way for the model to suggest code with less indent. Typical example of this:

int main()
{
    printf("Hello world!\n");
    |

Now the completion is "}", but it will not work unless there are no spaces on that line. With spaces, the model is constrained to " }".

[olegklimov]

(a similar issue is smallcloudai/refact-vs-classic#9)

[olegklimov]

No, it doesn't work. Grey text looks like this:

And after Tab it accepts it like this:

[hazratisulton]

Checked #16 - working.