This could be used to insert specialized information, which is related
to WS handler or display engine like CEF/Qt5

warning: Conditional section does not have a corresponding \endcond command within this file.

Generalized RooArgusBG PDF to allow integration with parameter c (slope parameter) >= 0.

* Fix typo with code tags in FittingHistograms.md

* Standardise presentation of TH1 and TF1 in FittingHistograms.md

There were multiple different presentations of TH1, TF1 and functions e.g.
TH1::Fit. Some TH1 and TF1 references were in bold, others were not. Likewise,
sometimes the TH1 in e.g. TH1::Fit was in bold while sometimes it was not.

This commit changes all instances of TH1, TF1 which are alone to bold and in
code tags. All instances of TH1:: or TF1:: are not in bold.

Proper variables should be exported to parent cmake file,
also directories should be set

Was not a case up to now

Its content was moved to cefdisplay and qt5webdisplay

It is default way how CEF configured

One should be able to run ROOT without setting extra path variables

Qt5 now requires that custom "rootscheme:" registered before Qt
application created. Therefore now there is no separated handlers for
different window - single handler created once. Works now with only
THttpServer instance (like in CEF), can be enhanced later for many of
them.

Special handling of file responses required.
When file not exists, 404 reqply shoould be returned

Also try how RWebWindow runs with the http protocol

With WebGui.ForceHttp: 1 rootrc parameter all web window will use real
http server for communication. It can be important for some JavaScript
libraries which does not support redirection with specialized protocol
names.

With the time they tend to modify some methods.
To coupe with such changes, we will try to use #ifdef - as long as it
works.

The user might use utilities which print on cout and expects the output
to be shown immediately.

This patch automatically flushes std::cout after each execution of a wrapper.

Make sure they are placed in ${build_dir}/include and
${install_dir}/include.

This is a pythonisation for TGraph, TGraph2D and their error
subclasses. In particular, it pythonises their getter methods
of the X,Y,Z coordinate and error arrays, which in C++ return
a pointer to a double.

The pythonization consists in setting the size of the array
that the getter method returns, so that it is known in Python
and the array is fully usable (its length can be obtained,
it is iterable).

Fixes ROOT_GENERATE_DICTIONARY not finding v7 headers.

Otherwise, find_file(headerFile) will claim "I did that search already".

(cherry picked from commit 180a22a53c7ee76d5059c086dac4c8972b75a563)