DOC: format ConstrastEnhancement doc

Modules/Applications/AppFiltering/app/otbContrastEnhancement.cxx

@@ -164,13 +164,13 @@ private:
       "over the image and then use the whole dynamic: meaning flattening the "
       "histogram. That gives us gain for each bin that transform the original "
       "histogram into the flat one. This gain is then apply on the original "
-      "image." 
-      "\nThe application proposes several options to allow a finer result: "
-      "\n- There is an option to limit contrast. We choose to limit the contrast "
+      "image.\n\n"
+      "The application proposes several options to allow a finer result:\n\n"
+      "* There is an option to limit contrast. We choose to limit the contrast "
       "by modifying the original histogram. To do so we clip the histogram at a "
       "given height and redistribute equally among the bins the clipped population. "
-      "Then we add a local version of the algorithm. "
-       "\n- It is possible to apply the algorithm on tiles of the image, instead "
+      "Then we add a local version of the algorithm.\n"
+      "* It is possible to apply the algorithm on tiles of the image, instead "
       "of on the whole image. That gives us gain depending on "
       "the value of the pixel and its position in the image. In order to "
       "smoothen the result we interpolate the gain between tiles.");