[3.15] gh-150285: Fix too long docstrings in the zstd module (GH-150291) (GH-150335)

(cherry picked from commit 9fceb1c)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

Author: miss-islington

Lib/compression/zstd/__init__.py

@@ -61,8 +61,9 @@ def __setattr__(self, name, _):
 def get_frame_info(frame_buffer):
     """Get Zstandard frame information from a frame header.
 
-    *frame_buffer* is a bytes-like object. It should start from the beginning
-    of a frame, and needs to include at least the frame header (6 to 18 bytes).
+    *frame_buffer* is a bytes-like object. It should start from the
+    beginning of a frame, and needs to include at least the frame header
+    (6 to 18 bytes).
 
     The returned FrameInfo object has two attributes.
     'decompressed_size' is the size in bytes of the data in the frame when
@@ -103,16 +104,17 @@ def finalize_dict(zstd_dict, /, samples, dict_size, level):
     finalize *zstd_dict* by adding headers and statistics according to the
     Zstandard dictionary format.
 
-    You may compose an effective dictionary content by hand, which is used as
-    basis dictionary, and use some samples to finalize a dictionary. The basis
-    dictionary may be a "raw content" dictionary. See *is_raw* in ZstdDict.
+    You may compose an effective dictionary content by hand, which is used
+    as basis dictionary, and use some samples to finalize a dictionary.  The
+    basis dictionary may be a "raw content" dictionary.  See *is_raw* in
+    ZstdDict.
 
-    *samples* is an iterable of samples, where a sample is a bytes-like object
-    representing a file.
+    *samples* is an iterable of samples, where a sample is a bytes-like
+    object representing a file.
     *dict_size* is the dictionary's maximum size, in bytes.
     *level* is the expected compression level. The statistics for each
-    compression level differ, so tuning the dictionary to the compression level
-    can provide improvements.
+    compression level differ, so tuning the dictionary to the compression
+    level can provide improvements.
     """
 
     if not isinstance(zstd_dict, ZstdDict):
@@ -140,8 +142,8 @@ def compress(data, level=None, options=None, zstd_dict=None):
     COMPRESSION_LEVEL_DEFAULT ('3').
     *options* is a dict object that contains advanced compression
     parameters. See CompressionParameter for more on options.
-    *zstd_dict* is a ZstdDict object, a pre-trained Zstandard dictionary. See
-    the function train_dict for how to train a ZstdDict on sample data.
+    *zstd_dict* is a ZstdDict object, a pre-trained Zstandard dictionary.
+    See the function train_dict for how to train a ZstdDict on sample data.
 
     For incremental compression, use a ZstdCompressor instead.
     """
@@ -152,8 +154,8 @@ def compress(data, level=None, options=None, zstd_dict=None):
 def decompress(data, zstd_dict=None, options=None):
     """Decompress one or more frames of Zstandard compressed *data*.
 
-    *zstd_dict* is a ZstdDict object, a pre-trained Zstandard dictionary. See
-    the function train_dict for how to train a ZstdDict on sample data.
+    *zstd_dict* is a ZstdDict object, a pre-trained Zstandard dictionary.
+    See the function train_dict for how to train a ZstdDict on sample data.
     *options* is a dict object that contains advanced compression
     parameters. See DecompressionParameter for more on options.
 

Lib/compression/zstd/_zstdfile.py

@@ -36,9 +36,9 @@ def __init__(self, file, /, mode='r', *,
 
         *file* can be either an file-like object, or a file name to open.
 
-        *mode* can be 'r' for reading (default), 'w' for (over)writing, 'x' for
-        creating exclusively, or 'a' for appending. These can equivalently be
-        given as 'rb', 'wb', 'xb' and 'ab' respectively.
+        *mode* can be 'r' for reading (default), 'w' for (over)writing, 'x'
+        for creating exclusively, or 'a' for appending.  These can
+        equivalently be given as 'rb', 'wb', 'xb' and 'ab' respectively.
 
         *level* is an optional int specifying the compression level to use,
         or COMPRESSION_LEVEL_DEFAULT if not given.
@@ -296,26 +296,27 @@ def open(file, /, mode='rb', *, level=None, options=None, zstd_dict=None,
          encoding=None, errors=None, newline=None):
     """Open a Zstandard compressed file in binary or text mode.
 
-    file can be either a file name (given as a str, bytes, or PathLike object),
-    in which case the named file is opened, or it can be an existing file object
-    to read from or write to.
+    file can be either a file name (given as a str, bytes, or PathLike
+    object), in which case the named file is opened, or it can be
+    an existing file object to read from or write to.
 
-    The mode parameter can be 'r', 'rb' (default), 'w', 'wb', 'x', 'xb', 'a',
-    'ab' for binary mode, or 'rt', 'wt', 'xt', 'at' for text mode.
+    The mode parameter can be 'r', 'rb' (default), 'w', 'wb', 'x', 'xb',
+    'a', 'ab' for binary mode, or 'rt', 'wt', 'xt', 'at' for text mode.
 
-    The level, options, and zstd_dict parameters specify the settings the same
-    as ZstdFile.
+    The level, options, and zstd_dict parameters specify the settings the
+    same as ZstdFile.
 
     When using read mode (decompression), the options parameter is a dict
-    representing advanced decompression options. The level parameter is not
-    supported in this case. When using write mode (compression), only one of
-    level, an int representing the compression level, or options, a dict
-    representing advanced compression options, may be passed. In both modes,
-    zstd_dict is a ZstdDict instance containing a trained Zstandard dictionary.
-
-    For binary mode, this function is equivalent to the ZstdFile constructor:
-    ZstdFile(filename, mode, ...). In this case, the encoding, errors and
-    newline parameters must not be provided.
+    representing advanced decompression options.  The level parameter is not
+    supported in this case.  When using write mode (compression), only one
+    of level, an int representing the compression level, or options, a dict
+    representing advanced compression options, may be passed.  In both
+    modes, zstd_dict is a ZstdDict instance containing a trained Zstandard
+    dictionary.
+
+    For binary mode, this function is equivalent to the ZstdFile
+    constructor: ZstdFile(filename, mode, ...).  In this case, the encoding,
+    errors and newline parameters must not be provided.
 
     For text mode, an ZstdFile object is created, and wrapped in an
     io.TextIOWrapper instance with the specified encoding, error handling