Fix ConfigParser interpolation (#2456)

novelwriter/common.py

@@ -680,11 +680,12 @@ class NWConfigParser(ConfigParser):
     """Common: Adapted Config Parser
 
     This is a subclass of the standard config parser that adds type safe
-    helper functions, and support for lists.
+    helper functions, and support for lists. It also turns off
+    interpolation, which would require % symbols to be escaped (#2455).
     """
 
     def __init__(self) -> None:
-        super().__init__()
+        super().__init__(interpolation=None)
         return
 
     def rdStr(self, section: str, option: str, default: str) -> str:

tests/test_dialogs/test_dlg_preferences.py

@@ -271,8 +271,8 @@ def testDlgPreferences_Settings(qtbot, monkeypatch, nwGUI, fncPath, tstPaths):
     prefs.dialogLine.setText("–")
     prefs.narratorBreak.setCurrentData("–", "")
     prefs.narratorDialog.setCurrentData("–", "")
-    prefs.altDialogOpen.setText("<")
-    prefs.altDialogClose.setText(">")
+    prefs.altDialogOpen.setText("%")  # Symbol also tests for #2455
+    prefs.altDialogClose.setText("%")  # Symbol also tests for #2455
     prefs.highlightEmph.setChecked(False)
     prefs.showMultiSpaces.setChecked(False)
 
@@ -401,8 +401,8 @@ def testDlgPreferences_Settings(qtbot, monkeypatch, nwGUI, fncPath, tstPaths):
     assert CONFIG.dialogLine == "–"
     assert CONFIG.narratorBreak == "–"
     assert CONFIG.narratorDialog == "–"
-    assert CONFIG.altDialogOpen == "<"
-    assert CONFIG.altDialogClose == ">"
+    assert CONFIG.altDialogOpen == "%"
+    assert CONFIG.altDialogClose == "%"
     assert CONFIG.highlightEmph is False
     assert CONFIG.showMultiSpaces is False