Misc reader bugs

[wwared]

Things that fail to read but shouldn't:

• 'foo.bar
• 'as\df

Things that read but print weirdly (usually involving \ escapes):

• \ escapes are not properly handled and give surprising results since they're printed directly to the terminal:

lurk-user> 'foo\bar
[1 iteration] => foar
lurk-user> 'asd\f
[1 iteration] => asd\u{c}
lurk-user>
lurk-user> '\b
[1 iteration] =>

• '|1foo| prints as 1foo instead of |1foo|