Make read_evokeds() expand "~" to home directory

doc/changes/latest.inc

@@ -122,6 +122,8 @@ Bugs
 
 - In :func:`mne.preprocessing.find_bad_channels_maxwell`, do not re-filter the data if a low-pass filter with the requested frequency has already been applied (:gh:`xxx` by `Richard Höchenberger`_)
 
+- :func:`mne.read_evokeds` now correctly expands ``~`` in the provided path to the user's home directory (:gh:`10685` by `Richard Höchenberger`_)
+
 API and behavior changes
 ~~~~~~~~~~~~~~~~~~~~~~~~
 - When creating BEM surfaces via :func:`mne.bem.make_watershed_bem` and :func:`mne.bem.make_flash_bem`, the ``copy`` parameter now defaults to ``True``. This means that instead of creating symbolic links inside the FreeSurfer subject's ``bem`` folder, we now create "actual" files. This should avoid troubles when sharing files across different operating systems and file systems (:gh:`10531` by `Richard Höchenberger`_)

mne/evoked.py

@@ -1110,8 +1110,8 @@ def read_evokeds(fname, condition=None, baseline=None, kind='average',
 
     Parameters
     ----------
-    fname : str
-        The file name, which should end with -ave.fif or -ave.fif.gz.
+    fname : path-like
+        The file name, which should end with ``-ave.fif`` or ``-ave.fif.gz``.
     condition : int or str | list of int or str | None
         The index or list of indices of the evoked dataset to read. FIF files
         can contain multiple datasets. If None, all datasets are returned as a
@@ -1159,6 +1159,7 @@ def read_evokeds(fname, condition=None, baseline=None, kind='average',
         saving, this will be reflected in their ``baseline`` attribute after
         reading.
     """
+    fname = _check_fname(fname, overwrite='read', must_exist=True)
     check_fname(fname, 'evoked', ('-ave.fif', '-ave.fif.gz',
                                   '_ave.fif', '_ave.fif.gz'))
     logger.info('Reading %s ...' % fname)