…txy)

to new file examples/common.hxx

elm-pb
laplacexy/laplace_perp
gyro-gem example (using zero for I parameter)
alfven-wave example (using sinty for I parameter)

…nates.hxx"

(rather than passing one to it for it to modify).

…ordinates()

…esFactory constructor.

as `DataFileFacade.addOnce` method does not take const arguments.

because the function is marked const.

but need to copy value to a non-const variable to pass to `DataFileFacade.addOnce` method.

…kamak_coordinates method`

…luid example. Declare variable noshear

…ject

…dinates_factory.make_tokamak_coordinates()

…rmalise()

…k_coordinates_factory.make_tokamak_coordinates()"

…okamak_coordinates() method

class `TokamakCoordinatesFactory` renamed to `TokamakCoordinates`
method `tokamak_coordinates_factory` renamed to `tokamak_coordinates`