DOC: grammatical mistakes

pandas/io/stata.py

@@ -57,7 +57,7 @@
     identifier of column that should be used as index of the DataFrame
 convert_missing : boolean, defaults to False
     Flag indicating whether to convert missing values to their Stata
-    representations.  If False, missing values are replaced with nans.
+    representations.  If False, missing values are replaced with nan.
     If True, columns containing missing values are returned with
     object data types and missing values are represented by
     StataMissingValue objects.
@@ -249,7 +249,7 @@ def convert_year_month_safe(year, month):
         """
         Convert year and month to datetimes, using pandas vectorized versions
         when the date range falls within the range supported by pandas.  Other
-        wise it falls back to a slower but more robust method using datetime.
+        -wise it falls back to a slower but more robust method using datetime.
         """
         if year.max() < MAX_YEAR and year.min() > MIN_YEAR:
             return to_datetime(100 * year + month, format='%Y%m')
@@ -261,7 +261,7 @@ def convert_year_month_safe(year, month):
 
     def convert_year_days_safe(year, days):
         """
-        Converts year (e.g. 1999) and days since the start of the year to a
+        Converts year (e.g. 1999) and days since the start of the year to
         datetime or datetime64 Series
         """
         if year.max() < (MAX_YEAR - 1) and year.min() > MIN_YEAR: