Restrict dialogue line symbols

tests/test_base/test_base_common.py

@@ -37,8 +37,9 @@ from novelwriter.common import (
     formatFileFilter, formatInt, formatTime, formatTimeStamp, formatVersion,
     fuzzyTime, getFileSize, hexToInt, isHandle, isItemClass, isItemLayout,
     isItemType, isListInstance, isTitleTag, jsonEncode, makeFileNameSafe,
-    minmax, numberToRoman, openExternalPath, readTextFile, simplified,
-    transferCase, uniqueCompact, xmlElement, xmlIndent, xmlSubElem, yesNo
+    minmax, numberToRoman, openExternalPath, processDialogSymbols,
+    readTextFile, simplified, transferCase, uniqueCompact, xmlElement,
+    xmlIndent, xmlSubElem, yesNo
 )
 
 from tests.mocked import causeOSError
@@ -377,6 +378,14 @@ def testBaseCommon_uniqueCompact():
     assert uniqueCompact("3 2 1") == "123"
 
 
+@pytest.mark.base
+def testBaseCommon_processDialogSymbols():
+    """Test the processDialogSymbols function."""
+    assert processDialogSymbols("abc") == ""
+    assert processDialogSymbols("\u00ab\u00ab\u00bb\u00bb") == "\u00ab\u00bb"
+    assert processDialogSymbols("-\u2013\u2014\u2015") == "\u2013\u2014\u2015"
+
+
 @pytest.mark.base
 def testBaseCommon_elide():
     """Test the elide function."""