fix(plain_text): use parsed object instead of self

closes #130

CHANGELOG.rst

@@ -1,7 +1,6 @@
-..
-    Unreleased
-    ----------
-    * 
+Unreleased
+----------
+* Fixed a bug in ``plain_text`` causing ``IndexError`` when using a custom function to replace ``templates``/``parser_functions``.
 
 v0.55.9
 -------

tests/wikitext/test_plain_text.py

@@ -239,3 +239,12 @@ def test_tag_containing_comment_with_no_end():  # 126
     )
     del parsed.wikilinks[0][:]
     assert parsed.plain_text().strip() == ''
+
+
+def test_on_list_with_replace_template_function():  # 130
+    assert (
+        parse('\n#:{{a}}')
+        .get_lists()[0]
+        .plain_text(replace_templates=lambda t: t.name)
+        == '#:a'
+    )

wikitextparser/_wikitext.py

@@ -677,7 +677,7 @@ def remove(b: int, e: int):
             remove(b, e)
 
         if callable(replace_templates):
-            for template in self.templates:
+            for template in parsed.templates:
                 b, e = template._span_data[:2]  # noqa
                 if lst[b] is None:  # overwritten
                     continue
@@ -688,7 +688,7 @@ def remove(b: int, e: int):
                 remove(b, e)
 
         if callable(replace_parser_functions):
-            for pf in self.parser_functions:
+            for pf in parsed.parser_functions:
                 b, e = pf._span_data[:2]
                 if lst[b] is None:  # already overwritten
                     continue