gitsum | parse and summarise git repository history | Parser library

I am working on an R package that is supposed to parse git repository history on a granular level. When validating some of the parsing results with an open source project from GitHub, I encountered something unexpected. In previous validation efforts of my package, I managed reconstruct the number of lines of each file in several git repositories correctly via the output of git log, so I thought using git log to obtain comprehensive information about changed files is a valid path to follow. However, I found a commit in the aforementioned project where git log does not seem to convey all information about changed files: The commit with the hash 184f6c71dee03c66c7adaacb024b70d99075ea75. When resetting HEAD to this commit and running both git log --stat and git show --log, I get this: