Merge pull request #12645 from Carreau/str-path

Fix mistake where str is inserted into a list of Path.

IPython/testing/globalipapp.py

@@ -14,6 +14,8 b' import sys'
 import types
 import warnings
 
+from pathlib import Path
+
 from . import tools
 
 from IPython.core import page
@@ -95,7 +97,7 b' def start_ipython():'
     # A few more tweaks needed for playing nicely with doctests...
 
     # remove history file
-    shell.tempfiles.append(config.HistoryManager.hist_file)
+    shell.tempfiles.append(Path(config.HistoryManager.hist_file))
 
     # These traps are normally only active for interactive use, set them
     # permanently since we'll be mocking interactive sessions.