Investors will find encouraging and discouraging numbers in the report — but what they’re really looking for are signals about whether Comcast has any doubt that federal officials will approve its acquisition of Time Warner Cable. CEO Brian Roberts says this morning that he still looks forward to approval. The boost in the dividend to $1 a share each year, plus the increase in the share repurchase plan to $10 billion — including $4.25 billion in 2015 — underscore “our…