Avoid useless './' in file paths

[treeent]

Hi,

While trying to rip a cd, whipper exits with KeyError: 'T'

Here is the traceback:

INFO:whipper.command.cd:FreeDB identifies disc as ['Various / 40 ans de rock français']
Traceback (most recent call last):
  File "/usr/bin/whipper", line 33, in <module>
    sys.exit(load_entry_point('whipper==0.10.0', 'console_scripts', 'whipper')())
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/whipper/command/main.py", line 56, in main
    ret = cmd.do()
          ^^^^^^^^
  File "/usr/lib/python3.11/site-packages/whipper/command/basecommand.py", line 141, in do
    return self.cmd.do()
           ^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/whipper/command/basecommand.py", line 141, in do
    return self.cmd.do()
           ^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/whipper/command/cd.py", line 155, in do
    out_fpath = self.program.getPath(out_bpath,
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/whipper/common/program.py", line 243, in getPath
    return template % v_fltr  # Avoid useless './' in file paths
           ~~~~~~~~~^~~~~~~~

[github-actions]

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