bpo-25237: Documentation for tkinter modules (GH-1870)

diff --git a/Doc/library/tkinter.scrolledtext.rst b/Doc/library/tkinter.scrolledtext.rst
index 138720e..d20365b 100644
--- a/Doc/library/tkinter.scrolledtext.rst
+++ b/Doc/library/tkinter.scrolledtext.rst
@@ -14,8 +14,7 @@
 The :mod:`tkinter.scrolledtext` module provides a class of the same name which
 implements a basic text widget which has a vertical scroll bar configured to do
 the "right thing."  Using the :class:`ScrolledText` class is a lot easier than
-setting up a text widget and scroll bar directly.  The constructor is the same
-as that of the :class:`tkinter.Text` class.
+setting up a text widget and scroll bar directly.
 
 The text widget and scrollbar are packed together in a :class:`Frame`, and the
 methods of the :class:`Grid` and :class:`Pack` geometry managers are acquired
@@ -25,12 +24,14 @@
 Should more specific control be necessary, the following attributes are
 available:
 
-
-.. attribute:: ScrolledText.frame
-
-   The frame which surrounds the text and scroll bar widgets.
+.. class:: ScrolledText(master=None, **kw)
 
 
-.. attribute:: ScrolledText.vbar
+   .. attribute:: frame
 
-   The scroll bar widget.
+      The frame which surrounds the text and scroll bar widgets.
+
+
+   .. attribute:: vbar
+
+      The scroll bar widget.