ENH : remove the - from the option alias name

Utils/otbConcatenateImages.cxx

@@ -100,14 +100,14 @@ int ConcatenateImages::Describe(ApplicationDescriptor* descriptor)
   descriptor->SetName("ConcatenateImages");
   descriptor->SetDescription("Concatenate n images in a multiband image");
   descriptor->AddOutputImage();
-  descriptor->AddOptionNParams("InputImagesList", "Images list to concatenate", "-il", true,ApplicationDescriptor::InputImage);
+  descriptor->AddOptionNParams("InputImagesList", "Images list to concatenate", "il", true,ApplicationDescriptor::InputImage);
   descriptor->AddOption("OutputPixelType",
                         "OutputPixelType: unsigned char (1), short int (2), int (3), float (4),"
                         " double (5), unsigned short int (12), unsigned int (13); default 2",
-                        "-t", 1, false, ApplicationDescriptor::Integer);
+                        "t", 1, false, ApplicationDescriptor::Integer);
   descriptor->AddOption("OutputNameList",
                         "Text file containing the name of the images used to generate the output in the same order",
-                        "-ot", 1, false,ApplicationDescriptor::String);
+                        "ot", 1, false,ApplicationDescriptor::String);
 
   return EXIT_SUCCESS;
 }