Impossible to create a diff from file – 5.2.6

[marysieek]

In version 5.2.5, it was possible to create a diff from the file by using the following command:

diff2html -i file -- my-file-diff.diff

Starting from 5.2.6, it is impossible to create a diff from the file, using the same command. The error I receive is:

Unknown argument: my-file-diff.diff
error Command failed with exit code 1.