Fixed saving a document xltx, xltm to xlsx and xlsm respectively
Created originally on Bitbucket by pikhovkin (Sergey Pikhovkin)
Was already merged in Bitbucket before import, marked as merged by the import user
Source changeset not longer availableat the time of import. Commit listwill look empty
If document save from xltm template (it was created in MSExcel) to xlsm by openpyxl, then later MSExcel cann't open this document.