_update_command: Fix bug when checking type of action.region

Author: elifarley

src/cedarscript_editor/cedarscript_editor.py

@@ -133,7 +133,7 @@ def _update_command(self, cmd: UpdateCommand):
         # ''';
         # target = IdentifierFromFile(file_path='refactor-benchmark/checks_BaseModelAdminChecks__check_raw_id_fields_item/checks.py', identifier_type=<MarkerType.FUNCTION: 'function'>, name='_check_raw_id_fields_item', where_clause=None, offset=None)
         # action = ReplaceClause(region=Marker(type=<MarkerType.LINE: line>, value=def _check_raw_id_fields_item(self, obj, field_name, label):, offset=None))
-        if search_range.line_count and not isinstance(action.region, Segment):
+        if search_range.line_count and not isinstance(action.region if hasattr(action, 'region') else None, Segment):
             marker, search_range = find_marker_or_segment(action, lines, search_range)
             search_range = restrict_search_range_for_marker(
                 marker, action, lines, search_range, identifier_finder

tests/corpus/update.file.insert.before.line/chat.xml

@@ -0,0 +1,9 @@
+<no-train>
+```CEDARScript
+UPDATE FILE "main.something"
+INSERT BEFORE LINE "parturient"
+WITH CONTENT '''
+@-4:#@-4 before line 'parturient'
+'''
+```
+</no-train>

tests/corpus/update.file.insert.before.line/expected.main.something

@@ -0,0 +1,16 @@
+Lorem ipsum odor amet,
+  consectetuer adipiscing elit.
+Ligula vestibulum semper sagittis sapien class.
+Dolor nascetur litora feugiat urna,
+    natoque venenatis fames.
+    At elementum urna suspendisse
+    himenaeos massa dui.
+        Vivamus in
+          risus cursus
+            ac vulputate dolor;
+                amet pulvinar.
+                    Fames tempus habitasse
+                      etiam a
+    #@-4 before line 'parturient'
+                      parturient
+                    mollis.

tests/corpus/update.file.insert.before.line/main.something

@@ -0,0 +1,15 @@
+Lorem ipsum odor amet,
+  consectetuer adipiscing elit.
+Ligula vestibulum semper sagittis sapien class.
+Dolor nascetur litora feugiat urna,
+    natoque venenatis fames.
+    At elementum urna suspendisse
+    himenaeos massa dui.
+        Vivamus in
+          risus cursus
+            ac vulputate dolor;
+                amet pulvinar.
+                    Fames tempus habitasse
+                      etiam a
+                      parturient
+                    mollis.