Replaces all of std::endl with "\n".

BaseLib/StringTools.cpp

FileIO/Legacy/MeshIO.cpp

FileIO/Legacy/OGSIOVer4.cpp

FileIO/MeshIO/GMSHInterface.cpp

FileIO/MeshIO/GMSHLine.cpp

FileIO/MeshIO/GMSHLineLoop.cpp

FileIO/MeshIO/GMSHPolygonTree.cpp

FileIO/RapidXmlIO/RapidVtuInterface.cpp

FileIO/Writer.cpp

GeoLib/Polyline.cpp

GeoLib/Raster.cpp

Gui/DataView/DirectConditionGenerator.cpp

Gui/VtkVis/VtkColorLookupTable.cpp

Gui/VtkVis/VtkMeshSource.cpp

Gui/VtkVis/VtkVisPipeline.cpp

MathLib/LinAlg/Dense/Matrix.h

MathLib/sparse.h

MeshLib/Mesh2MeshPropertyInterpolation.cpp

Utils/FileConverter/ConvertSHPToGLI.cpp

Utils/FileConverter/GMSH2OGS.cpp