How-to-guide.md

@@ -15,4 +15,4 @@ The folder `ete3` is located within the `.../lib/pythonX.X/site-package` folder
 
 Reference: https://github.com/etetoolkit/ete/issues/173
 
-If it remains unclear : https://gitlab.mbb.univ-montp2.fr/edna/custom_reference_database/-/issues/4
\ No newline at end of file
+If it remains unclear check the following issue: https://gitlab.mbb.univ-montp2.fr/edna/custom_reference_database/-/issues/4
\ No newline at end of file