updated sources to correct buildbot warnings

modules/contrib/doc/retina/index.rst

@@ -209,7 +209,7 @@ Retina::getMagno
 
         * a Mat, this output is rescaled for standard 8bits image processing use in OpenCV
 
-        * RAW methods actually return a 1D matrix (encoding is M1, M2, ... Mn), this output is the original retina filter model output, without any quantification or rescaling.
+        * RAW methods actually return a 1D matrix (encoding is M1, M2,... Mn), this output is the original retina filter model output, without any quantification or rescaling.
 
 Retina::getParameters
 +++++++++++++++++++++

samples/cpp/tutorial_code/contrib/retina_tutorial.cpp

@@ -147,4 +147,3 @@ int main(int argc, char* argv[]) {
 
     return 0;
 }
-