[Tutorials] Better description of sqlite3 tutorials.

tutorials/dataframe/df027_SQliteDependencyOverVersion.C

 /// \file
 /// \ingroup tutorial_dataframe
-/// \notebook -js
-///
-/// This tutorial demonstrates how RDataFrame can be used to create a
-/// connection with a SQlite3 database. It accesses the Sqlite data base, and makes
-/// a query selecting the entire table.
+/// \notebook -jss
+/// Plot the ROOT downloads based on the version reading a remote sqlite3 file with RSqliteDS.
 /// This tutorial uses the Reduce method which allows to extract the minimum time 
 /// stored in the SQlite3 database.
 /// The next step is to create a TH1F Histogram, which will be filled with the values stored in
 /// two different columns from the database. This procedure is simplified with a lambda
 /// expression that takes as parameters the values stored in the "Time" and "Version" columns.
-/// This product includes GeoLite2 data created by MaxMind, available from
-/// <a href="http://www.maxmind.com">http://www.maxmind.com</a>.
 ///
 /// \macro_code
 /// \macro_image

tutorials/dataframe/df028_SQliteIPLocation.C

 /// \file
 /// \ingroup tutorial_dataframe
 /// \notebook -js
-/// This tutorial demonstrates how RDataFrame can be used to create a
-/// connection with a SQlite3 database. It accesses the Sqlite data base, and makes
-/// a query selecting the entire table.
+/// Plot the location of ROOT downloads reading a remote sqlite3 file with RSqliteDS.
 /// The world map is hold by a TH2Poly histogram which, after filling, will show
 /// the world wide dispersion of ROOT's users.
 /// To histogram filling, is done thanks to a lambda expression having as input parameters

tutorials/dataframe/df029_SQlitePlatformDistribution.C

 /// \file
 /// \ingroup tutorial_dataframe
 /// \notebook -js
-/// This tutorial demonstrates how RDataFrame can be used to create a
-/// connection with a SQlite3 database. It accesses the Sqlite data base, and makes
-/// a query selecting the entire table.
+
 /// In order to display the Platform Distribution of ROOT, we choose to create two TH1F
 /// histograms: one that includes all types of platforms, other filtering and classifying them.
 /// This procedure is using a lambda expression taking as parameter the values
 /// stored in the "Platform" column from the database. At the end, the histograms are filled
 /// with their specific demand regarding the platform's type.
-/// This product includes GeoLite2 data created by MaxMind, available from
-/// <a href="http://www.maxmind.com">http://www.maxmind.com</a>.
 ///
 /// \macro_code
 /// \macro_image

tutorials/dataframe/df030_SQliteVersionsOfROOT.C

 /// \file
 /// \ingroup tutorial_dataframe
 /// \notebook -js
-/// This tutorial demonstrates how RDataFrame can be used to create a
-/// connection with a SQlite3 database. It accesses the Sqlite data base, and makes
-/// a query selecting the entire table.
+/// Plot the downloads of different ROOT versions reading a remote sqlite3 file with RSqliteDS.
 /// Then a TH1F histogram is created and filled
 /// using a lambda expression which receives the recorded
 /// values in the “version” column of the sqlite3 database.
 /// The histogram shows the usage of the ROOT development version.
-/// This product includes GeoLite2 data created by MaxMind, available from
-/// <a href="http://www.maxmind.com">http://www.maxmind.com</a>.
 ///
 /// \macro_code
 /// \macro_image