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single method with two different implementations.
There is one version of this method for human readability
(printHumanReadableQuery()) and a version for machine consumption
(printMachineReadableQuery()).
The reason for having two versions is because different behaviour is
needed in different scenarios
* In machine readable mode the entire query is printed inside a single
``(assert ...)``. This is done to allow ``(let ...)`` to abbreviate
as much as possible.
* In human readable mode each constraint and query expression is printed
inside its own ``(assert ...)`` unless the abbreviation mode is
ABBR_LET in which case all constraints and query expr are printed
inside a single ``(assert ...)`` much like in the machine readable mode
Whilst I was here I also fixed a bug handling identation when printing
``(let ...)`` expressions in printAssert()
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