Clang format run on near-the-header lines.

Happy New Year

 in creating of the instances of classes of coupled processes.

 and added a OGS_FATAL checking for the global vector of the solution of
 the previous time step

that is originally for the monolithic scheme.

 from the two classes of coupled term.

[Coupling] Changed the members of the coupled term,

 which only contains the solutions of the coupled equations.

 in one class either with the monolithic scheme or with the staggered scheme.

Added a boolean member to class Process to distinguish the monolithic scheme and the staggered scheme

In some processes (using non-local methods, for example)
the assembly is split in two parts: computation of local
quantities and actual (non-local) assembly (integration)
into the local matrices.

pointer to StaggeredCouplingTerm

passing the coupling term via function argument.

this is already done at start of iteration

This has some follow-up changes.

Don't repeat typename in emplace_back.

 coupled processes.

coupled terms.

Also fix the order in the initializer list.

Remove default value.

... for the given variable and component ids instead of all element nodes,
which might not be a part of the associated mesh subset.