adding a change

src/black/comments.py

@@ -270,48 +270,47 @@ def generate_ignored_nodes(
 ) -> Iterator[LN]:
     """Starting from the container of `leaf`, generate all leaves until `# fmt: on`.
 
-    If comment is skip, returns leaf only.
+    If the comment is `# fmt: skip`, returns leaf only.
     Stops at the end of the block.
     """
     if _contains_fmt_skip_comment(comment.value, mode):
         yield from _generate_ignored_nodes_from_fmt_skip(leaf, comment)
         return
+
     container: Optional[LN] = container_of(leaf)
     while container is not None and container.type != token.ENDMARKER:
         if is_fmt_on(container):
             return
 
-        # fix for fmt: on in children
+        # Handle multiline strings explicitly
+        if container.type == token.STRING and "\n" in container.value:
+            yield container
+            container = container.next_sibling
+            continue
+
+        # Fix for fmt: on in children
         if children_contains_fmt_on(container):
             for index, child in enumerate(container.children):
                 if isinstance(child, Leaf) and is_fmt_on(child):
                     if child.type in CLOSING_BRACKETS:
-                        # This means `# fmt: on` is placed at a different bracket level
-                        # than `# fmt: off`. This is an invalid use, but as a courtesy,
-                        # we include this closing bracket in the ignored nodes.
-                        # The alternative is to fail the formatting.
+                        # Handle fmt: on at different bracket levels
                         yield child
                     return
                 if (
                     child.type == token.INDENT
                     and index < len(container.children) - 1
                     and children_contains_fmt_on(container.children[index + 1])
                 ):
-                    # This means `# fmt: on` is placed right after an indentation
-                    # level, and we shouldn't swallow the previous INDENT token.
                     return
                 if children_contains_fmt_on(child):
                     return
                 yield child
         else:
-            if container.type == token.DEDENT and container.next_sibling is None:
-                # This can happen when there is no matching `# fmt: on` comment at the
-                # same level as `# fmt: on`. We need to keep this DEDENT.
-                return
             yield container
             container = container.next_sibling
 
 
+
 def _generate_ignored_nodes_from_fmt_skip(
     leaf: Leaf, comment: ProtoComment
 ) -> Iterator[LN]:

src/black/linegen.py

@@ -1,6 +1,4 @@
-"""
-Generating lines of code.
-"""
+" Generating lines of code. "
 
 import re
 import sys
@@ -85,23 +83,22 @@
 from blib2to3.pgen2 import token
 from blib2to3.pytree import Leaf, Node
 
-# types
+" types "
 LeafID = int
 LN = Union[Leaf, Node]
 
 
 class CannotSplit(CannotTransform):
-    """A readable split that fits the allotted line length is impossible."""
+    " A readable split that fits the allotted line length is impossible. "
 
 
-# This isn't a dataclass because @dataclass + Generic breaks mypyc.
-# See also https://github.com/mypyc/mypyc/issues/827.
+" This isn't a dataclass because @dataclass + Generic breaks mypyc. "
+" See also https://github.com/mypyc/mypyc/issues/827. "
 class LineGenerator(Visitor[Line]):
-    """Generates reformatted Line objects.  Empty lines are not emitted.
+    """ Generates reformatted Line objects.  Empty lines are not emitted.
 
     Note: destroys the tree it's visiting by mutating prefixes of its leaves
-    in ways that will no longer stringify to valid Python code on the tree.
-    """
+    in ways that will no longer stringify to valid Python code on the tree. """
 
     def __init__(self, mode: Mode, features: Collection[Feature]) -> None:
         self.mode = mode

src/black/ranges.py

@@ -1,4 +1,4 @@
-"""Functions related to Black's formatting by line ranges feature."""
+" Functions related to Black's formatting by line ranges feature. "
 
 import difflib
 from collections.abc import Collection, Iterator, Sequence