Hot fix release 5.5.4

CHANGELOG.md

@@ -4,6 +4,10 @@ Changelog
 NOTE: isort follows the [semver](https://semver.org/) versioning standard.
 Find out more about isort's release policy [here](https://pycqa.github.io/isort/docs/major_releases/release_policy/).
 
+### 5.5.4 [Hotfix] September 29, 2020
+  - Fixed #1507: in rare cases isort changes the content of multiline strings after a yield statement.
+  - Fixed #1505: Support case where known_SECTION points to a section not listed in sections. 
+
 ### 5.5.3 [Hotfix] September 20, 2020
   - Fixed #1488: in rare cases isort can mangle `yield from` or `raise from` statements.
 

isort/_version.py

@@ -1 +1 @@
-__version__ = "5.5.3"
+__version__ = "5.5.4"

isort/core.py

@@ -373,15 +373,6 @@ def process(
                         stripped_line = new_line.strip().split("#")[0]
 
                 if stripped_line.startswith("raise") or stripped_line.startswith("yield"):
-                    if "(" in stripped_line:
-                        while ")" not in stripped_line:
-                            new_line = input_stream.readline()
-                            if not new_line:
-                                break
-
-                            output_stream.write(new_line)
-                            stripped_line = new_line.strip().split("#")[0]
-
                     while stripped_line.endswith("\\"):
                         new_line = input_stream.readline()
                         if not new_line:

tests/unit/test_regressions.py

@@ -1081,3 +1081,43 @@ def generator_function():
      from \\
 """
     assert isort.check_code(raise_from_at_file_end_ignored, show_diff=True)
+
+
+def test_isort_shouldnt_mangle_from_multi_line_string_issue_1507():
+    """isort was seen mangling lines that happened to contain the word from after
+    a yield happened to be in a file. Clearly this shouldn't happen.
+    See: https://github.com/PyCQA/isort/issues/1507.
+    """
+    assert isort.check_code(
+        '''
+def a():
+    yield f(
+        """
+        select %s from (values %%s) as t(%s)
+        """
+    )
+
+def b():
+    return (
+        """
+        select name
+        from foo
+        """
+        % main_table
+    )
+
+def c():
+    query = (
+        """
+        select {keys}
+        from (values %s) as t(id)
+        """
+    )
+
+def d():
+    query = f"""select t.id
+                from {table} t
+                {extra}"""
+''',
+        show_diff=True,
+    )