fixed formatting of default na values

Author: kushagr96

pandas/io/parsers/readers.py

@@ -142,8 +142,7 @@ class _read_shared(TypedDict, Generic[HashableT], total=False):
     _read_shared = dict
 
 
-_doc_read_csv_and_table = (
-    r"""
+_doc_read_csv_and_table = r"""
 {summary}
 
 Also supports optionally iterating or breaking of the file
@@ -272,9 +271,7 @@ class _read_shared(TypedDict, Generic[HashableT], total=False):
 na_values : Hashable, Iterable of Hashable or dict of {{Hashable : Iterable}}, optional
     Additional strings to recognize as ``NA``/``NaN``. If ``dict`` passed, specific
     per-column ``NA`` values.  By default the following values are interpreted as
-    ``NaN``: " """
-    + fill('", "'.join(sorted(STR_NA_VALUES)), 70, subsequent_indent="    ")
-    + """ ".
+    ``NaN``: "{na_values_str}".
 
 keep_default_na : bool, default True
     Whether or not to include the default ``NaN`` values when parsing the data.
@@ -545,7 +542,6 @@ class _read_shared(TypedDict, Generic[HashableT], total=False):
 col 3    datetime64[ns]
 dtype: object
 """
-)
 
 
 class _C_Parser_Defaults(TypedDict):
@@ -756,6 +752,9 @@ def read_csv(
         summary="Read a comma-separated values (csv) file into DataFrame.",
         see_also_func_name="read_table",
         see_also_func_summary="Read general delimited file into DataFrame.",
+        na_values_str=fill(
+            '", "'.join(sorted(STR_NA_VALUES)), 70, subsequent_indent="    "
+        ),
         _default_sep="','",
         storage_options=_shared_docs["storage_options"],
         decompression_options=_shared_docs["decompression_options"]
@@ -888,6 +887,9 @@ def read_table(
         see_also_func_summary=(
             "Read a comma-separated values (csv) file into DataFrame."
         ),
+        na_values_str=fill(
+            '", "'.join(sorted(STR_NA_VALUES)), 70, subsequent_indent="    "
+        ),
         _default_sep=r"'\\t' (tab-stop)",
         storage_options=_shared_docs["storage_options"],
         decompression_options=_shared_docs["decompression_options"]