DOC: Fix PR08 issues in docstrings in pandas.core.groupby

[dayoreke]

Current errors:

$ ./scripts/validate_docstrings.py --errors=PR08
pandas.Series.corr: Parameter "method" description should start with a capital letter
pandas.Series.quantile: Parameter "q" description should start with a capital letter
pandas.Series.drop_duplicates: Parameter "keep" description should start with a capital letter
pandas.Series.duplicated: Parameter "keep" description should start with a capital letter
pandas.Series.rename: Parameter "index" description should start with a capital letter
pandas.Series.reorder_levels: Parameter "order" description should start with a capital letter
pandas.Series.dt.tz_localize: Parameter "errors" description should start with a capital letter
pandas.Series.str.match: Parameter "flags" description should start with a capital letter
pandas.Series.str.replace: Parameter "case" description should start with a capital letter
pandas.Series.str.replace: Parameter "flags" description should start with a capital letter
pandas.Series.str.replace: Parameter "regex" description should start with a capital letter
pandas.Series.str.translate: Parameter "table" description should start with a capital letter
pandas.Series.cat.rename_categories: Parameter "new_categories" description should start with a capital letter
pandas.Series.hist: Parameter "xrot" description should start with a capital letter
pandas.Series.hist: Parameter "yrot" description should start with a capital letter
pandas.Series.hist: Parameter "figsize" description should start with a capital letter
pandas.Timestamp.ceil: Parameter "ambiguous" description should start with a capital letter
pandas.Timestamp.day_name: Parameter "locale" description should start with a capital letter
pandas.Timestamp.floor: Parameter "ambiguous" description should start with a capital letter
pandas.Timestamp.fromordinal: Parameter "ordinal" description should start with a capital letter
pandas.Timestamp.month_name: Parameter "locale" description should start with a capital letter
pandas.Timestamp.round: Parameter "ambiguous" description should start with a capital letter
pandas.Timestamp.tz_localize: Parameter "errors" description should start with a capital letter
pandas.Period.to_timestamp: Parameter "how" description should start with a capital letter
pandas.arrays.IntervalArray.from_tuples: Parameter "copy" description should start with a capital letter
pandas.arrays.IntervalArray.from_breaks: Parameter "copy" description should start with a capital letter
pandas.read_msgpack: Parameter "iterator" description should start with a capital letter
pandas.io.json.build_table_schema: Parameter "primary_key" description should start with a capital letter
pandas.read_html: Parameter "skiprows" description should start with a capital letter
pandas.HDFStore.put: Parameter "format" description should start with a capital letter
pandas.HDFStore.append: Parameter "format" description should start with a capital letter
pandas.HDFStore.append: Parameter "append      " description should start with a capital letter
pandas.HDFStore.append: Parameter "dropna      " description should start with a capital letter
pandas.read_feather: Parameter "nthreads" description should start with a capital letter
pandas.read_feather: Parameter "use_threads" description should start with a capital letter
pandas.read_sql_table: Parameter "parse_dates" description should start with a capital letter
pandas.read_sql_query: Parameter "con" description should start with a capital letter
pandas.read_sql_query: Parameter "parse_dates" description should start with a capital letter
pandas.read_sql: Parameter "con" description should start with a capital letter
pandas.read_sql: Parameter "parse_dates" description should start with a capital letter
pandas.core.resample.Resampler.get_group: Parameter "name" description should start with a capital letter
pandas.core.resample.Resampler.get_group: Parameter "obj" description should start with a capital letter
pandas.core.resample.Resampler.pipe: Parameter "args" description should start with a capital letter
pandas.core.resample.Resampler.pipe: Parameter "kwargs" description should start with a capital letter
pandas.core.resample.Resampler.ffill: Parameter "limit" description should start with a capital letter
pandas.core.resample.Resampler.pad: Parameter "limit" description should start with a capital letter
pandas.core.resample.Resampler.sem: Parameter "ddof" description should start with a capital letter
pandas.core.resample.Resampler.var: Parameter "ddof" description should start with a capital letter
pandas.plotting.parallel_coordinates: Parameter "ax" description should start with a capital letter
pandas.plotting.scatter_matrix: Parameter "alpha" description should start with a capital letter
pandas.plotting.scatter_matrix: Parameter "figsize" description should start with a capital letter
pandas.plotting.scatter_matrix: Parameter "grid" description should start with a capital letter
pandas.plotting.scatter_matrix: Parameter "diagonal" description should start with a capital letter
pandas.plotting.scatter_matrix: Parameter "range_padding" description should start with a capital letter
pandas.plotting.table: Parameter "data" description should start with a capital letter
pandas.plotting.table: Parameter "kwargs" description should start with a capital letter
pandas.api.types.union_categoricals: Parameter "to_union" description should start with a capital letter
pandas.merge_ordered: Parameter "how" description should start with a capital letter
pandas.merge_asof: Parameter "allow_exact_matches" description should start with a capital letter
pandas.to_numeric: Parameter "errors" description should start with a capital letter
pandas.to_datetime: Parameter "arg" description should start with a capital letter
pandas.to_datetime: Parameter "errors" description should start with a capital letter
pandas.to_datetime: Parameter "box" description should start with a capital letter
pandas.to_datetime: Parameter "format" description should start with a capital letter
pandas.to_datetime: Parameter "exact" description should start with a capital letter
pandas.to_datetime: Parameter "unit" description should start with a capital letter
pandas.to_timedelta: Parameter "box" description should start with a capital letter
pandas.to_timedelta: Parameter "errors" description should start with a capital letter
pandas.infer_freq: Parameter "index" description should start with a capital letter
pandas.util.hash_array: Parameter "encoding" description should start with a capital letter
pandas.util.hash_pandas_object: Parameter "index" description should start with a capital letter
pandas.util.hash_pandas_object: Parameter "encoding" description should start with a capital letter
pandas.Index.drop_duplicates: Parameter "keep" description should start with a capital letter
pandas.Index.is_: Parameter "other" description should start with a capital letter
pandas.Index.fillna: Parameter "downcast" description should start with a capital letter
pandas.Index.to_series: Parameter "index" description should start with a capital letter
pandas.Index.to_series: Parameter "name" description should start with a capital letter
pandas.Index.get_indexer: Parameter "method" description should start with a capital letter
pandas.Index.get_loc: Parameter "method" description should start with a capital letter
pandas.CategoricalIndex.rename_categories: Parameter "new_categories" description should start with a capital letter
pandas.IntervalIndex.from_tuples: Parameter "copy" description should start with a capital letter
pandas.IntervalIndex.from_breaks: Parameter "copy" description should start with a capital letter
pandas.IntervalIndex.get_loc: Parameter "method" description should start with a capital letter
pandas.IntervalIndex.get_indexer: Parameter "method" description should start with a capital letter
pandas.MultiIndex.set_levels: Parameter "levels" description should start with a capital letter
pandas.MultiIndex.set_levels: Parameter "level" description should start with a capital letter
pandas.MultiIndex.set_levels: Parameter "inplace" description should start with a capital letter
pandas.MultiIndex.set_levels: Parameter "verify_integrity" description should start with a capital letter
pandas.MultiIndex.set_codes: Parameter "codes" description should start with a capital letter
pandas.MultiIndex.set_codes: Parameter "level" description should start with a capital letter
pandas.MultiIndex.set_codes: Parameter "inplace" description should start with a capital letter
pandas.MultiIndex.set_codes: Parameter "verify_integrity" description should start with a capital letter
pandas.MultiIndex.get_loc_level: Parameter "drop_level" description should start with a capital letter
pandas.MultiIndex.get_indexer: Parameter "method" description should start with a capital letter
pandas.MultiIndex.get_level_values: Parameter "level" description should start with a capital letter
pandas.DatetimeIndex.indexer_at_time: Parameter "time" description should start with a capital letter
pandas.DatetimeIndex.indexer_between_time: Parameter "start_time, end_time" description should start with a capital letter
pandas.DatetimeIndex.tz_localize: Parameter "errors" description should start with a capital letter
pandas.TimedeltaIndex.to_series: Parameter "index" description should start with a capital letter
pandas.TimedeltaIndex.to_series: Parameter "name" description should start with a capital letter
pandas.PeriodIndex.asfreq: Parameter "freq" description should start with a capital letter
pandas.PeriodIndex.asfreq: Parameter "how" description should start with a capital letter
pandas.core.window.rolling.Rolling.apply: Parameter "raw" description should start with a capital letter
pandas.core.window.expanding.Expanding.apply: Parameter "raw" description should start with a capital letter
pandas.core.groupby.GroupBy.get_group: Parameter "name" description should start with a capital letter
pandas.core.groupby.GroupBy.get_group: Parameter "obj" description should start with a capital letter
pandas.Grouper: Parameter "key" description should start with a capital letter
pandas.Grouper: Parameter "level" description should start with a capital letter
pandas.Grouper: Parameter "sort" description should start with a capital letter
pandas.core.groupby.GroupBy.pipe: Parameter "args" description should start with a capital letter
pandas.core.groupby.GroupBy.pipe: Parameter "kwargs" description should start with a capital letter
pandas.core.groupby.GroupBy.bfill: Parameter "limit" description should start with a capital letter
pandas.core.groupby.GroupBy.ffill: Parameter "limit" description should start with a capital letter
pandas.core.groupby.GroupBy.nth: Parameter "n" description should start with a capital letter
pandas.core.groupby.GroupBy.nth: Parameter "dropna" description should start with a capital letter
pandas.core.groupby.GroupBy.rank: Parameter "method" description should start with a capital letter
pandas.core.groupby.GroupBy.rank: Parameter "na_option" description should start with a capital letter
pandas.core.groupby.GroupBy.sem: Parameter "ddof" description should start with a capital letter
pandas.core.groupby.GroupBy.std: Parameter "ddof" description should start with a capital letter
pandas.core.groupby.GroupBy.var: Parameter "ddof" description should start with a capital letter
pandas.core.groupby.DataFrameGroupBy.bfill: Parameter "limit" description should start with a capital letter
pandas.core.groupby.DataFrameGroupBy.ffill: Parameter "limit" description should start with a capital letter
pandas.core.groupby.DataFrameGroupBy.filter: Parameter "dropna" description should start with a capital letter
pandas.core.groupby.DataFrameGroupBy.rank: Parameter "method" description should start with a capital letter
pandas.core.groupby.DataFrameGroupBy.rank: Parameter "na_option" description should start with a capital letter
pandas.core.groupby.DataFrameGroupBy.shift: Parameter "periods" description should start with a capital letter
pandas.core.groupby.DataFrameGroupBy.boxplot: Parameter "subplots" description should start with a capital letter
pandas.core.groupby.DataFrameGroupBy.boxplot: Parameter "layout" description should start with a capital letter
pandas.io.formats.style.Styler: Parameter "precision" description should start with a capital letter
pandas.io.formats.style.Styler: Parameter "table_styles" description should start with a capital letter
pandas.io.formats.style.Styler: Parameter "uuid" description should start with a capital letter
pandas.io.formats.style.Styler: Parameter "caption" description should start with a capital letter
pandas.io.formats.style.Styler.apply: Parameter "func" description should start with a capital letter
pandas.io.formats.style.Styler.apply: Parameter "axis" description should start with a capital letter
pandas.io.formats.style.Styler.apply: Parameter "subset" description should start with a capital letter
pandas.io.formats.style.Styler.apply: Parameter "**kwargs" description should start with a capital letter
pandas.io.formats.style.Styler.applymap: Parameter "func" description should start with a capital letter
pandas.io.formats.style.Styler.applymap: Parameter "subset" description should start with a capital letter
pandas.io.formats.style.Styler.applymap: Parameter "**kwargs" description should start with a capital letter
pandas.io.formats.style.Styler.where: Parameter "cond" description should start with a capital letter
pandas.io.formats.style.Styler.where: Parameter "value" description should start with a capital letter
pandas.io.formats.style.Styler.where: Parameter "other" description should start with a capital letter
pandas.io.formats.style.Styler.where: Parameter "subset" description should start with a capital letter
pandas.io.formats.style.Styler.where: Parameter "**kwargs" description should start with a capital letter
pandas.io.formats.style.Styler.set_properties: Parameter "subset" description should start with a capital letter
pandas.io.formats.style.Styler.set_properties: Parameter "**kwargs" description should start with a capital letter
pandas.io.formats.style.Styler.highlight_max: Parameter "subset" description should start with a capital letter
pandas.io.formats.style.Styler.highlight_max: Parameter "axis" description should start with a capital letter
pandas.io.formats.style.Styler.highlight_min: Parameter "subset" description should start with a capital letter
pandas.io.formats.style.Styler.highlight_min: Parameter "axis" description should start with a capital letter
pandas.io.formats.style.Styler.background_gradient: Parameter "cmap" description should start with a capital letter
pandas.io.formats.style.Styler.background_gradient: Parameter "low" description should start with a capital letter
pandas.io.formats.style.Styler.background_gradient: Parameter "high" description should start with a capital letter
pandas.io.formats.style.Styler.background_gradient: Parameter "axis" description should start with a capital letter
pandas.io.formats.style.Styler.background_gradient: Parameter "subset" description should start with a capital letter
pandas.io.formats.style.Styler.background_gradient: Parameter "text_color_threshold" description should start with a capital letter
pandas.io.formats.style.Styler.bar: Parameter "axis" description should start with a capital letter
pandas.io.formats.style.Styler.use: Parameter "styles" description should start with a capital letter
pandas.api.extensions.ExtensionArray.argsort: Parameter "*args, **kwargs:" description should start with a capital letter
pandas.DataFrame.insert: Parameter "column" description should start with a capital letter

This is a subset of #27977

[dayoreke]

I will be working on

pandas.core.groupby.GroupBy.pipe: Parameter "args" description should start with a capital letter
pandas.core.groupby.GroupBy.pipe: Parameter "kwargs" description should start with a capital letter
pandas.core.groupby.GroupBy.bfill: Parameter "limit" description should start with a capital letter
pandas.core.groupby.GroupBy.ffill: Parameter "limit" description should start with a capital letter
pandas.core.groupby.GroupBy.nth: Parameter "n" description should start with a capital letter
pandas.core.groupby.GroupBy.nth: Parameter "dropna" description should start with a capital letter
pandas.core.groupby.GroupBy.rank: Parameter "method" description should start with a capital letter
pandas.core.groupby.GroupBy.rank: Parameter "na_option" description should start with a capital letter
pandas.core.groupby.GroupBy.sem: Parameter "ddof" description should start with a capital letter
pandas.core.groupby.GroupBy.std: Parameter "ddof" description should start with a capital letter
pandas.core.groupby.GroupBy.var: Parameter "ddof" description should start with a capital letter
pandas.core.groupby.DataFrameGroupBy.bfill: Parameter "limit" description should start with a capital letter
pandas.core.groupby.DataFrameGroupBy.ffill: Parameter "limit" description should start with a capital letter
pandas.core.groupby.DataFrameGroupBy.filter: Parameter "dropna" description should start with a capital letter
pandas.core.groupby.DataFrameGroupBy.rank: Parameter "method" description should start with a capital letter
pandas.core.groupby.DataFrameGroupBy.rank: Parameter "na_option" description should start with a capital letter
pandas.core.groupby.DataFrameGroupBy.shift: Parameter "periods" description should start with a capital letter

[anirudnits]

I would like to work on this.

[simonjayhawkins]

Thanks @dayoreke . I believe this is the same as #25232.

Feel free to work on pieces of it at a time, and reference that issue in each PR.