more relatively noncontroversial features

src/black/linegen.py

@@ -282,9 +282,7 @@ def visit_match_case(self, node: Node) -> Iterator[Line]:
 
     def visit_suite(self, node: Node) -> Iterator[Line]:
         """Visit a suite."""
-        if (
+        if is_stub_suite(node):
-            self.mode.is_pyi or Preview.dummy_implementations in self.mode
-        ) and is_stub_suite(node):
             yield from self.visit(node.children[2])
         else:
             yield from self.visit_default(node)
@@ -299,9 +297,7 @@ def visit_simple_stmt(self, node: Node) -> Iterator[Line]:
 
         is_suite_like = node.parent and node.parent.type in STATEMENT
         if is_suite_like:
-            if (
+            if is_stub_body(node):
-                self.mode.is_pyi or Preview.dummy_implementations in self.mode
-            ) and is_stub_body(node):
                 yield from self.visit_default(node)
             else:
                 yield from self.line(+1)
@@ -309,11 +305,7 @@ def visit_simple_stmt(self, node: Node) -> Iterator[Line]:
                 yield from self.line(-1)
 
         else:
-            if (
+            if not node.parent or not is_stub_suite(node.parent):
-                not (self.mode.is_pyi or Preview.dummy_implementations in self.mode)
-                or not node.parent
-                or not is_stub_suite(node.parent)
-            ):
                 yield from self.line()
             yield from self.visit_default(node)
 
@@ -405,7 +397,6 @@ def foo(a: int, b: float = 7): ...
 
         def foo(a: (int), b: (float) = 7): ...
         """
-        if Preview.parenthesize_long_type_hints in self.mode:
         assert len(node.children) == 3
         if maybe_make_parens_invisible_in_atom(node.children[2], parent=node):
             wrap_in_parentheses(node, node.children[2], visible=False)
@@ -514,13 +505,7 @@ def __post_init__(self) -> None:
         self.visit_with_stmt = partial(v, keywords={"with"}, parens={"with"})
         self.visit_classdef = partial(v, keywords={"class"}, parens=Ø)
 
-        # When this is moved out of preview, add ":" directly to ASSIGNMENTS in nodes.py
+        self.visit_expr_stmt = partial(v, keywords=Ø, parens=ASSIGNMENTS)
-        if Preview.parenthesize_long_type_hints in self.mode:
-            assignments = ASSIGNMENTS | {":"}
-        else:
-            assignments = ASSIGNMENTS
-        self.visit_expr_stmt = partial(v, keywords=Ø, parens=assignments)
-
         self.visit_return_stmt = partial(v, keywords={"return"}, parens={"return"})
         self.visit_import_from = partial(v, keywords=Ø, parens={"import"})
         self.visit_del_stmt = partial(v, keywords=Ø, parens={"del"})
@@ -900,9 +885,8 @@ def _maybe_split_omitting_optional_parens(
             # The RHSResult Omitting Optional Parens.
             rhs_oop = _first_right_hand_split(line, omit=omit)
             if not (
-                Preview.prefer_splitting_right_hand_side_of_assignments in line.mode
                 # the split is right after `=`
-                and len(rhs.head.leaves) >= 2
+                len(rhs.head.leaves) >= 2
                 and rhs.head.leaves[-2].type == token.EQUAL
                 # the left side of assignment contains brackets
                 and any(leaf.type in BRACKETS for leaf in rhs.head.leaves[:-1])

src/black/lines.py

@@ -550,8 +550,7 @@ def maybe_empty_lines(self, current_line: Line) -> LinesBlock:
         lines (two on module-level).
         """
         form_feed = (
-            Preview.allow_form_feeds in self.mode
+            current_line.depth == 0
-            and current_line.depth == 0
             and bool(current_line.leaves)
             and "\f\n" in current_line.leaves[0].prefix
         )
@@ -565,8 +564,7 @@ def maybe_empty_lines(self, current_line: Line) -> LinesBlock:
             else before - previous_after
         )
         if (
-            Preview.module_docstring_newlines in current_line.mode
+            self.previous_block
-            and self.previous_block
             and self.previous_block.previous_block is None
             and len(self.previous_block.original_line.leaves) == 1
             and self.previous_block.original_line.is_triple_quoted_string
@@ -770,11 +768,7 @@ def _maybe_empty_lines_for_class_or_def(  # noqa: C901
             newlines = 1 if current_line.depth else 2
             # If a user has left no space after a dummy implementation, don't insert
             # new lines. This is useful for instance for @overload or Protocols.
-            if (
+            if self.previous_line.is_stub_def and not user_had_newline:
-                Preview.dummy_implementations in self.mode
-                and self.previous_line.is_stub_def
-                and not user_had_newline
-            ):
                 newlines = 0
         if comment_to_add_newlines is not None:
             previous_block = comment_to_add_newlines.previous_block
@@ -831,13 +825,6 @@ def is_line_short_enough(  # noqa: C901
 
     width = str_width if mode.preview else len
 
-    if Preview.multiline_string_handling not in mode:
-        return (
-            width(line_str) <= mode.line_length
-            and "\n" not in line_str  # multiline strings
-            and not line.contains_standalone_comments()
-        )
-
     if line.contains_standalone_comments():
         return False
     if "\n" not in line_str:

src/black/mode.py

@@ -168,21 +168,13 @@ def supports_feature(target_versions: Set[TargetVersion], feature: Feature) -> b
 class Preview(Enum):
     """Individual preview style features."""
 
-    blank_line_after_nested_stub_class = auto()
     hex_codes_in_unicode_sequences = auto()
-    multiline_string_handling = auto()
-    prefer_splitting_right_hand_side_of_assignments = auto()
     # NOTE: string_processing requires wrap_long_dict_values_in_parens
     # for https://github.com/psf/black/issues/3117 to be fixed.
     string_processing = auto()
     parenthesize_conditional_expressions = auto()
-    parenthesize_long_type_hints = auto()
     wrap_long_dict_values_in_parens = auto()
-    wrap_multiple_context_managers_in_parens = auto()
-    dummy_implementations = auto()
-    module_docstring_newlines = auto()
     hug_parens_with_braces_and_square_brackets = auto()
-    allow_form_feeds = auto()
 
 
 class Deprecated(UserWarning):

src/black/nodes.py

@@ -121,6 +121,7 @@
     ">>=",
     "**=",
     "//=",
+    ":",
 }
 
 IMPLICIT_TUPLE: Final = {syms.testlist, syms.testlist_star_expr, syms.exprlist}