tests: AppVeyor: fix test/functional/ex_cmds/arg_spec.lua (#10598)

For unknown reasons it does not have the trailing space in `:args`
output there anymore:

    [  FAILED  ] test/functional\ex_cmds\arg_spec.lua @ 11: :argument does not restart :terminal buffer
    test/functional\ex_cmds\arg_spec.lua:25: Expected objects to be the same.
    Passed in:
    (string) '
    [term://.//4552:C:\Windows\system32\cmd.exe]'
    Expected:
    (string) '
    [term://.//4552:C:\Windows\system32\cmd.exe] '
    stack traceback:
            test/functional\ex_cmds\arg_spec.lua:25: in function <test/functional\ex_cmds\arg_spec.lua:11>

The test is not about that though, and this can be made less strict by
using `trim()`.  The new test in `test_arglist.vim` for no trailing
newline is OK, and contains trailing spaces.  So this is likely due to
the length of it exceeding the column width already.

0 files changed, 0 insertions, 0 deletions