- remove trailing white spaces.

We will instead hide all OpenCascade-related headers from ROOT's interface.

This reverts commit 9b8c396d.

This reverts commit e160cd3e.

This reverts commit c71e9ade.

This reverts commit 922b53cf.

This reverts commit 7bc58016.

This reverts commit 1d9eddb9.

This reverts commit 2c1c8a14.

The reader cannot know who read that tree before, maybe another reader,
and warning about previous state right after birth is too much of a guess.
Fixes an issue where RDF creates exactly that situation.

Otherwise, combining geocad headers leads to inconsistent definitions of Handle.

Otherwise we get compilation errors:
In file included from /usr/include/oce/Handle_Interface_TypedValue.hxx:11:0,
                 from /usr/include/oce/Handle_Interface_Static.hxx:11,
                 from /usr/include/oce/Interface_Static.hxx:11,
                 from /mnt/build/jenkins/wsincr/LABEL/ROOT-centos7/SPEC/default/root/geom/geocad/src/TOCCToStep.cxx:38:
/usr/include/oce/Handle_MoniTool_TypedValue.hxx:14:27: error: aggregate ‘Handle Standard_Type’ has incomplete type and cannot be defined
 class Handle(Standard_Type);
                           ^

The variable BUILD_SHARED_LIBS is treated specially by CMake, as
described below:

$ cmake --help-variable BUILD_SHARED_LIBS
BUILD_SHARED_LIBS
-----------------

Global flag to cause ``add_library()`` to create shared libraries if on.

If present and true, this will cause all libraries to be built shared
unless the library was explicitly added as a static library.  This
variable is often added to projects as an ``option()`` so that each user
of a project can decide if they want to build the project using shared or
static libraries.

interpreter/llvm/src/include/llvm/ADT/SmallVector.h:296:13:
  warning: ‘void* memcpy(void*, const void*, size_t)’ writing to an
  object of type ‘struct std::pair<clang::CXXMethodDecl*,
  const clang::FunctionProtoType*>’ with no trivial copy-assignment
  use copy-assignment or copy-initialization instead [-Wclass-memaccess]
       memcpy(Dest, I, (E - I) * sizeof(T));
       ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The intended use of this macro is to add compile options that are not
requirements of ROOT, like options to ignore certain warnings. However,
since the option names depend on the compiler, check each flag before
adding it to the list, so that only supported flags are added.

Without this, dependencies specified in ROOT_LINKER_LIBRARY() get
dropped without any warning, leading to underlinking in external
projects that make use of ROOT CMake macros (including roottest).

Fixes: ROOT-9827

Implement an "argparse" unique description of man pages and usage for root commands. 

Update 6.16 Release notes for TMVA (including updated form Kim) and update also  list of contributors

The previous version of the code in rooteventselector first applied
the cut by invoking CopyTree on the input TTree, getting an output
tree as a result. After that, it deactivated the branches to exclude
and called CloneTree on the aforementioned output tree, thus getting
the final tree. When following this strategy, the final tree is
bigger than the input tree, probably because the intermediate tree
data (before the cloning) is also stored.

In order to successfully combine the exclusion of branches and a cut
we need to reverse the order of operations: first deactivate branches
and clone the tree, then apply the cut with CopyTree.

Note that keeping the initial solution, only changing the call
to Write on the final tree with Write("", ROOT.TObject.kOverwrite)
does not work either.

Users might want to connect to a notebook server launched with
'root --notebook' from another computer. This setting of the
Jupyter configuration makes that possible.

This also solves the issue explained here:

https://github.com/ipython/ipython/issues/6193

Depending on the network configuration of a machine/container,
binding on localhost might fail. This looks like the issue
reported on ROOT-9829.