test: use current user in the multi-user amend scenario
The obsfate template keyword that will be introduced in a later patch
distinguish between current user and other users when displaying the obsfate
users.
Update the test before for clarity.
# See http://EditorConfig.org for the specification
root = true
[*.py]
indent_size = 4
indent_style = space
trim_trailing_whitespace = true
[*.{c,h}]
indent_size = 8
indent_style = tab
trim_trailing_whitespace = true