💡 update README to include comma_compact_nulls option details

Author: techouse

README.rst

@@ -582,6 +582,9 @@ format of the output ``list``:
 `COMMA <https://techouse.github.io/qs_codec/qs_codec.models.html#qs_codec.enums.list_format.ListFormat.COMMA>`_, you can also pass the
 `comma_round_trip <https://techouse.github.io/qs_codec/qs_codec.models.html#qs_codec.models.encode_options.EncodeOptions.comma_round_trip>`__ option set to ``True`` or
 ``False``, to append ``[]`` on single-item ``list``\ s, so that they can round trip through a decoding.
+Set the `comma_compact_nulls <https://techouse.github.io/qs_codec/qs_codec.models.html#qs_codec.models.encode_options.EncodeOptions.comma_compact_nulls>`__ option to ``True`` with the same
+format when you'd like to drop ``None`` entries instead of keeping empty slots (e.g. ``[True, False, None, True]`` becomes
+``true,false,true``).
 
 `BRACKETS <https://techouse.github.io/qs_codec/qs_codec.models.html#qs_codec.enums.list_format.ListFormat.BRACKETS>`__ notation is used for encoding ``dict``\s by default:
 

docs/README.rst

@@ -538,6 +538,9 @@ format of the output ``list``:
 :py:attr:`COMMA <qs_codec.enums.list_format.ListFormat.COMMA>`, you can also pass the
 :py:attr:`comma_round_trip <qs_codec.models.encode_options.EncodeOptions.comma_round_trip>` option set to ``True`` or
 ``False``, to append ``[]`` on single-item ``list``\ s so they can round-trip through a decoding.
+Set :py:attr:`comma_compact_nulls <qs_codec.models.encode_options.EncodeOptions.comma_compact_nulls>` to ``True`` with the same
+format when you'd like to drop ``None`` entries instead of keeping empty slots (e.g.
+``[True, False, None, True]`` becomes ``true,false,true``).
 
 :py:attr:`BRACKETS <qs_codec.enums.list_format.ListFormat.BRACKETS>` notation is used for encoding ``dict``\s by default: