diff --git a/pandas/_testing.py b/pandas/_testing.py
index 01d2bfe0458c8..0b3004ce12013 100644
--- a/pandas/_testing.py
+++ b/pandas/_testing.py
@@ -1014,7 +1014,7 @@ def assert_extension_array_equal(
     Parameters
     ----------
     left, right : ExtensionArray
-        The two arrays to compare
+        The two arrays to compare.
     check_dtype : bool, default True
         Whether to check if the ExtensionArray dtypes are identical.
     check_less_precise : bool or int, default False
diff --git a/pandas/core/groupby/groupby.py b/pandas/core/groupby/groupby.py
index 1d7527e73079c..6b2880810dcb2 100644
--- a/pandas/core/groupby/groupby.py
+++ b/pandas/core/groupby/groupby.py
@@ -2329,7 +2329,7 @@ def shift(self, periods=1, freq=None, axis=0, fill_value=None):
         periods : int, default 1
             Number of periods to shift.
         freq : str, optional
-            Frequency string
+            Frequency string.
         axis : axis to shift, default 0
         fill_value : optional
 
diff --git a/pandas/core/indexers.py b/pandas/core/indexers.py
index fe475527f4596..cadae9da6092f 100644
--- a/pandas/core/indexers.py
+++ b/pandas/core/indexers.py
@@ -296,7 +296,7 @@ def check_array_indexer(array: AnyArrayLike, indexer: Any) -> Any:
     indexer : array-like or list-like
         The array-like that's used to index. List-like input that is not yet
         a numpy array or an ExtensionArray is converted to one. Other input
-        types are passed through as is
+        types are passed through as is.
 
     Returns
     -------
diff --git a/pandas/core/indexes/period.py b/pandas/core/indexes/period.py
index 986f87ffe3734..0b85433b699a8 100644
--- a/pandas/core/indexes/period.py
+++ b/pandas/core/indexes/period.py
@@ -85,7 +85,7 @@ class PeriodIndex(DatetimeIndexOpsMixin, Int64Index):
     copy : bool
         Make a copy of input ndarray.
     freq : str or period object, optional
-        One of pandas period strings or corresponding objects
+        One of pandas period strings or corresponding objects.
     year : int, array, or Series, default None
     month : int, array, or Series, default None
     quarter : int, array, or Series, default None
diff --git a/pandas/io/formats/style.py b/pandas/io/formats/style.py
index 9c46a0036ab0d..d0c64d54f30d6 100644
--- a/pandas/io/formats/style.py
+++ b/pandas/io/formats/style.py
@@ -85,7 +85,7 @@ class Styler:
         number and ``<num_col>`` is the column number.
     na_rep : str, optional
         Representation for missing values.
-        If ``na_rep`` is None, no special formatting is applied
+        If ``na_rep`` is None, no special formatting is applied.
 
         .. versionadded:: 1.0.0
 
@@ -446,7 +446,7 @@ def format(self, formatter, subset=None, na_rep: Optional[str] = None) -> "Style
         Parameters
         ----------
         formatter : str, callable, dict or None
-            If ``formatter`` is None, the default formatter is used
+            If ``formatter`` is None, the default formatter is used.
         subset : IndexSlice
             An argument to ``DataFrame.loc`` that restricts which elements
             ``formatter`` is applied to.
diff --git a/pandas/io/sql.py b/pandas/io/sql.py
index 69e5a973ff706..e8666c495d39a 100644
--- a/pandas/io/sql.py
+++ b/pandas/io/sql.py
@@ -356,7 +356,7 @@ def read_sql(
     sql : str or SQLAlchemy Selectable (select or text object)
         SQL query to be executed or a table name.
     con : SQLAlchemy connectable (engine/connection) or database str URI
-        or DBAPI2 connection (fallback mode)'
+        or DBAPI2 connection (fallback mode).
 
         Using SQLAlchemy makes it possible to use any DB supported by that
         library. If a DBAPI2 object, only sqlite3 is supported. The user is responsible