adding support for argument substitution into sub-dictionaries for
e.g. pressureDifferencePatch, white space before, in and after the argument list
and continuation lines, for example:
functions
{
#includeFunc flowRatePatch(name=inlet)
#includeFunc flowRatePatch ( name = outlet )
#includeFunc pressureDifferencePatch \
( \
patch1 = inlet, \
patch2 = outlet \
)
#includeFunc yPlus
#includeFunc residuals
}
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