Re-organize directory structure (#4971)

See discussion in #2491

Co-authored-by: Ivan Levkivskyi <ilevkivskyi@dropbox.com>

stdlib/textwrap.pyi

@@ -0,0 +1,100 @@
+from typing import Callable, Dict, List, Optional, Pattern
+
+class TextWrapper:
+    width: int = ...
+    initial_indent: str = ...
+    subsequent_indent: str = ...
+    expand_tabs: bool = ...
+    replace_whitespace: bool = ...
+    fix_sentence_endings: bool = ...
+    drop_whitespace: bool = ...
+    break_long_words: bool = ...
+    break_on_hyphens: bool = ...
+    tabsize: int = ...
+    max_lines: Optional[int] = ...
+    placeholder: str = ...
+
+    # Attributes not present in documentation
+    sentence_end_re: Pattern[str] = ...
+    wordsep_re: Pattern[str] = ...
+    wordsep_simple_re: Pattern[str] = ...
+    whitespace_trans: str = ...
+    unicode_whitespace_trans: Dict[int, int] = ...
+    uspace: int = ...
+    x: str = ...  # leaked loop variable
+    def __init__(
+        self,
+        width: int = ...,
+        initial_indent: str = ...,
+        subsequent_indent: str = ...,
+        expand_tabs: bool = ...,
+        replace_whitespace: bool = ...,
+        fix_sentence_endings: bool = ...,
+        break_long_words: bool = ...,
+        drop_whitespace: bool = ...,
+        break_on_hyphens: bool = ...,
+        tabsize: int = ...,
+        *,
+        max_lines: Optional[int] = ...,
+        placeholder: str = ...,
+    ) -> None: ...
+    # Private methods *are* part of the documented API for subclasses.
+    def _munge_whitespace(self, text: str) -> str: ...
+    def _split(self, text: str) -> List[str]: ...
+    def _fix_sentence_endings(self, chunks: List[str]) -> None: ...
+    def _handle_long_word(self, reversed_chunks: List[str], cur_line: List[str], cur_len: int, width: int) -> None: ...
+    def _wrap_chunks(self, chunks: List[str]) -> List[str]: ...
+    def _split_chunks(self, text: str) -> List[str]: ...
+    def wrap(self, text: str) -> List[str]: ...
+    def fill(self, text: str) -> str: ...
+
+def wrap(
+    text: str,
+    width: int = ...,
+    *,
+    initial_indent: str = ...,
+    subsequent_indent: str = ...,
+    expand_tabs: bool = ...,
+    tabsize: int = ...,
+    replace_whitespace: bool = ...,
+    fix_sentence_endings: bool = ...,
+    break_long_words: bool = ...,
+    break_on_hyphens: bool = ...,
+    drop_whitespace: bool = ...,
+    max_lines: int = ...,
+    placeholder: str = ...,
+) -> List[str]: ...
+def fill(
+    text: str,
+    width: int = ...,
+    *,
+    initial_indent: str = ...,
+    subsequent_indent: str = ...,
+    expand_tabs: bool = ...,
+    tabsize: int = ...,
+    replace_whitespace: bool = ...,
+    fix_sentence_endings: bool = ...,
+    break_long_words: bool = ...,
+    break_on_hyphens: bool = ...,
+    drop_whitespace: bool = ...,
+    max_lines: int = ...,
+    placeholder: str = ...,
+) -> str: ...
+def shorten(
+    text: str,
+    width: int,
+    *,
+    initial_indent: str = ...,
+    subsequent_indent: str = ...,
+    expand_tabs: bool = ...,
+    tabsize: int = ...,
+    replace_whitespace: bool = ...,
+    fix_sentence_endings: bool = ...,
+    break_long_words: bool = ...,
+    break_on_hyphens: bool = ...,
+    drop_whitespace: bool = ...,
+    # Omit `max_lines: int = None`, it is forced to 1 here.
+    placeholder: str = ...,
+) -> str: ...
+def dedent(text: str) -> str: ...
+def indent(text: str, prefix: str, predicate: Optional[Callable[[str], bool]] = ...) -> str: ...