The courts are moving with customary alacrity in ruling on Mayor Rahm Emanuel’s request for an injunction that would have compelled teachers to return to the classroom this morning. Not so fast, the judge said, Wednesday would be soon enough, although “by then, the legal matter could be irrelevant. Union leadership could decide at its Tuesday meeting to end the walkout in anticipation of a vote by teachers down the road on a new contract proposal that was hammered out during marathon negotiations last week.”