docstrings: typos, clarity (pandas-dev#41845)

Minor changes only in docstrings

Author: stragu

pandas/core/generic.py

@@ -2229,8 +2229,8 @@ def to_excel(
         For compatibility with :meth:`~DataFrame.to_csv`,
         to_excel serializes lists and dicts to strings before writing.
 
-        Once a workbook has been saved it is not possible write further data
-        without rewriting the whole workbook.
+        Once a workbook has been saved it is not possible to write further
+        data without rewriting the whole workbook.
 
         Examples
         --------
@@ -2366,9 +2366,9 @@ def to_json(
             suitable format for JSON. Should receive a single argument which is
             the object to convert and return a serialisable object.
         lines : bool, default False
-            If 'orient' is 'records' write out line delimited json format. Will
-            throw ValueError if incorrect 'orient' since others are not list
-            like.
+            If 'orient' is 'records' write out line-delimited json format. Will
+            throw ValueError if incorrect 'orient' since others are not
+            list-like.
 
         compression : {{'infer', 'gzip', 'bz2', 'zip', 'xz', None}}
 
@@ -2669,7 +2669,7 @@ def to_hdf(
         --------
         read_hdf : Read from HDF file.
         DataFrame.to_parquet : Write a DataFrame to the binary parquet format.
-        DataFrame.to_sql : Write to a sql table.
+        DataFrame.to_sql : Write to a SQL table.
         DataFrame.to_feather : Write out feather-format for DataFrames.
         DataFrame.to_csv : Write out to a csv file.