Fix: removed unecessary warning when a file name comprises multiple dots (closes #3899)#3924

nicolasrochette wants to merge 2 commits intoscverse:mainscverse/scanpy:mainfrom

nicolasrochette:nicolasrochette/issue-3899-filename-ext-warningnicolasrochette/scanpy:nicolasrochette/issue-3899-filename-ext-warningCopy head branch name to clipboard