Fixed #1792: Sorting literals sometimes ignored when placed on first …

…few lines of file.

CHANGELOG.md

@@ -9,6 +9,7 @@ Find out more about isort's release policy [here](https://pycqa.github.io/isort/
   - Made all exceptions pickleable.
   - Fixed #1779: Pylama integration ignores pylama specific isort config overrides.
   - Fixed #1781: `--from-first` CLI flag shouldn't take any arguments.
+  - Fixed #1792: Sorting literals sometimes ignored when placed on first few lines of file.
 
 ### 5.9.2 July 8th 2021
   - Improved behavior of `isort --check --atomic` against Cython files.

isort/core.py

@@ -176,10 +176,13 @@ def process(
                 (index == 0 or (index in (1, 2) and not contains_imports))
                 and stripped_line.startswith("#")
                 and stripped_line not in config.section_comments
+                and stripped_line not in CODE_SORT_COMMENTS
             ):
                 in_top_comment = True
             elif in_top_comment and (
-                not line.startswith("#") or stripped_line in config.section_comments
+                not line.startswith("#")
+                or stripped_line in config.section_comments
+                or stripped_line in CODE_SORT_COMMENTS
             ):
                 in_top_comment = False
                 first_comment_index_end = index - 1

tests/unit/test_regressions.py

@@ -1828,3 +1828,44 @@ def test_isort_should_only_add_imports_to_valid_location_issue_1769():
 v=""""""
 '''
     )
+
+
+def test_literal_sort_at_top_of_file_issue_1792():
+    assert (
+        isort.code(
+            '''"""I'm a docstring! Look at me!"""
+
+# isort: unique-list
+__all__ = ["Foo", "Foo", "Bar"]
+
+from typing import final  # arbitrary
+
+
+@final
+class Foo:
+    ...
+
+
+@final
+class Bar:
+    ...
+'''
+        )
+        == '''"""I'm a docstring! Look at me!"""
+
+# isort: unique-list
+__all__ = ['Bar', 'Foo']
+
+from typing import final  # arbitrary
+
+
+@final
+class Foo:
+    ...
+
+
+@final
+class Bar:
+    ...
+'''
+    )