I am using MW 1.31 here. Before updating the wiki I usually check the differences between the current version (1.31.9) an the new version (1.31.10) by file comparison (WinMerge). I discovered many different filenames in the V1.31.10 version regarding odd named file extensions, so it seems. For example the folder resources\lib\oojs-ui\themes\wikimediaui\images\icons. This folder contains a lot of images as PNG and SVG type. In this folder a lot of files with file extension png in the V1.31.9 version seems to be renamed with pn as file extension in the V1.31.10 version. Same to the SVG files. About 180 files seems to be affected by a disappeared last letter in the V1.31.10 version.
Was this done on purpose, did the devil of mistakes creep in or is there something with my eyes? Many thanks for an answer in advance!