Better log messages

[adamralph]

Before

Success

Failure

Problems

• In both cases, the escaping of ", /, and : is flawed. It's easy to construct target names which make the resulting string ambiguous.
• In the failure case, the last line is confusing, since hell"o actually succeeded.

After

Success

Failure

Solutions

• The escaping has been removed. If people want to use weird target names that screw up the output, it's their prerogative.
• In the failure case, the confusion is lessened, since the message format follows that of the "Starting..." message. 🤷‍♂️

And some extra colour to boot. 🌈