Make semicolons optional if you type enter

[simonw]

I like being able to leave them off without puzzling about why the query didn't execute.

[simonw]

I tried sqlite3.complete_statement(statement + ";") for this but it turns out that function returns True for ALL things that end in a semicolon even if they are invalid SQL, like select 5 + .

[simonw]

Really wishing I had a test suite at this point.