[cleanup] fix two typos

See merge request !2745

(cherry picked from commit a30d1ca1)

0e600a53 [cleanup] fix typos in comments

Kilian Weishaupt authored Jun 17, 2019 and Melanie Lipp committed Jun 27, 2019

* this should make it easier to properly reconstruct a stress at the boundary

* before, fluxes were called for each eqIdx

Ned Coltman authored Feb 05, 2019 and Timo Koch committed Feb 26, 2019

[fluxvariables][gridfluxvarscache] adapt the fluxvariables to check for higherorder via the gridfluxvarscache, not the problem

* allow setting a fixed value anywhere in the domain
* do not use boundaryType but a separate function to check for fixed cell
* set 1.0 on the diagonal in the system matrix and 0.0 for the off-diagonal entries
  to improve numerical accuracy

* move to RANS problem

* add source (gravity) term to residual, also when face has Neumann BCs
* correct coupling condition

* fluxes over all faces (except the one on the boundary)
  need to be considerd

* index of the pressure has to equal the one of the main component
* advection law does not need outflow information
* fix some reference solutions

Kilian Weishaupt authored Apr 24, 2018 and Thomas Fetzer committed Apr 26, 2018

* rename elementFaceVars to elemFaceVars