Uninvert text prior to filtering

tests.py

@@ -8585,8 +8585,8 @@ def _test_book_link(base_dir: str):
         shutil.rmtree(base_dir, ignore_errors=False, onerror=None)
 
 
-def _test_uninvert():
-    print('uninvert')
+def _test_uninvert2():
+    print('uninvert2')
     inverted_text = 'abcdefghijklmnopqrstuvwxyz'
     uninverted_text = uninvert_text(inverted_text)
     if uninverted_text != inverted_text:
@@ -8601,12 +8601,12 @@ def _test_uninvert():
         print('uninverted: ' + uninverted_text)
     assert uninverted_text == inverted_text
 
-    inverted_text = 'ʍǝɹpuɐ'
+    inverted_text = '[ʍǝɹpuɐ]'
     uninverted_text = uninvert_text(inverted_text)
-    if uninverted_text != 'andrew':
+    if uninverted_text != '[andrew]':
         print('inverted:   ' + inverted_text)
         print('uninverted: ' + uninverted_text)
-    assert uninverted_text == 'andrew'
+    assert uninverted_text == '[andrew]'
 
     inverted_text = '˙ʇsǝʇ ɐ sı sıɥ⊥'
     uninverted_text = uninvert_text(inverted_text)
@@ -8633,7 +8633,7 @@ def run_all_tests():
     _test_checkbox_names()
     _test_thread_functions()
     _test_functions()
-    _test_uninvert()
+    _test_uninvert2()
     _test_book_link(base_dir)
     _test_dateformat()
     _test_is_right_to_left()

utils.py

@@ -189,7 +189,6 @@ def uninvert_text(text: str) -> str:
         '\u0055': '\u2229',
         '\u0056': '\u1D27',
         '\u0059': '\u2144',
-        '\u005B': '\u005D',
         '\u005F': '\u203E',
         '\u0061': '\u0250',
         '\u0062': '\u0071',
@@ -226,8 +225,25 @@ def uninvert_text(text: str) -> str:
         possible_result = ch_result + possible_result
 
     result = text
-    if matches > len(text)/2:
-        result = possible_result
+    if matches > len(text)/3:
+        result = possible_result.replace('9', '6')
+        new_result = ''
+        extra_replace = {
+            '[': ']',
+            ']': '[',
+            '(': ')',
+            ')': '(',
+            '<': '>',
+            '>': '<'
+        }
+        for ch1 in result:
+            ch_result = ch1
+            for ch2, rep in extra_replace.items():
+                if ch1 == ch2:
+                    ch_result = rep
+                    break
+            new_result += ch_result
+        result = new_result
     return result
 
 
@@ -4527,6 +4543,8 @@ def remove_inverted_text(text: str, system_language: str) -> str:
     if system_language != 'en':
         return text
 
+    text = uninvert_text(text)
+
     inverted_lower = [*"_ʎ_ʍʌ_ʇ_ɹ____ɯʃʞɾıɥƃɟǝ_ɔ_ɐ"]
     inverted_upper = [*"_⅄__ᴧ∩⊥_ᴚΌԀ_ᴎ_⅂⋊ſ__⅁ℲƎ◖Ↄ𐐒∀"]