diff --git a/Lib/idlelib/editor.py b/Lib/idlelib/editor.py
index f02498d..24b1ffc 100644
--- a/Lib/idlelib/editor.py
+++ b/Lib/idlelib/editor.py
@@ -53,9 +53,8 @@
     from idlelib.autoexpand import AutoExpand
     from idlelib.calltip import Calltip
     from idlelib.codecontext import CodeContext
-    from idlelib.format import FormatParagraph, FormatRegion
+    from idlelib.format import FormatParagraph, FormatRegion, Indents, Rstrip
     from idlelib.parenmatch import ParenMatch
-    from idlelib.rstrip import Rstrip
     from idlelib.squeezer import Squeezer
     from idlelib.zoomheight import ZoomHeight
 
@@ -173,14 +172,15 @@
         text.bind("<<newline-and-indent>>",self.newline_and_indent_event)
         text.bind("<<smart-indent>>",self.smart_indent_event)
         self.fregion = fregion = self.FormatRegion(self)
+        # self.fregion used in smart_indent_event to access indent_region.
         text.bind("<<indent-region>>", fregion.indent_region_event)
         text.bind("<<dedent-region>>", fregion.dedent_region_event)
         text.bind("<<comment-region>>", fregion.comment_region_event)
         text.bind("<<uncomment-region>>", fregion.uncomment_region_event)
         text.bind("<<tabify-region>>", fregion.tabify_region_event)
         text.bind("<<untabify-region>>", fregion.untabify_region_event)
-        text.bind("<<toggle-tabs>>", self.toggle_tabs_event)
-        text.bind("<<change-indentwidth>>",self.change_indentwidth_event)
+        text.bind("<<toggle-tabs>>", self.Indents.toggle_tabs_event)
+        text.bind("<<change-indentwidth>>", self.Indents.change_indentwidth_event)
         text.bind("<Left>", self.move_at_edge_if_selection(0))
         text.bind("<Right>", self.move_at_edge_if_selection(1))
         text.bind("<<del-word-left>>", self.del_word_left)
@@ -1424,20 +1424,6 @@
             return _icis(_startindex + "+%dc" % offset)
         return inner
 
-    def toggle_tabs_event(self, event):
-        if self.askyesno(
-              "Toggle tabs",
-              "Turn tabs " + ("on", "off")[self.usetabs] +
-              "?\nIndent width " +
-              ("will be", "remains at")[self.usetabs] + " 8." +
-              "\n Note: a tab is always 8 columns",
-              parent=self.text):
-            self.usetabs = not self.usetabs
-            # Try to prevent inconsistent indentation.
-            # User must change indent width manually after using tabs.
-            self.indentwidth = 8
-        return "break"
-
     # XXX this isn't bound to anything -- see tabwidth comments
 ##     def change_tabwidth_event(self, event):
 ##         new = self._asktabwidth()
@@ -1446,18 +1432,6 @@
 ##             self.set_indentation_params(0, guess=0)
 ##         return "break"
 
-    def change_indentwidth_event(self, event):
-        new = self.askinteger(
-                  "Indent width",
-                  "New indent width (2-16)\n(Always use 8 when using tabs)",
-                  parent=self.text,
-                  initialvalue=self.indentwidth,
-                  minvalue=2,
-                  maxvalue=16)
-        if new and new != self.indentwidth and not self.usetabs:
-            self.indentwidth = new
-        return "break"
-
     # Make string that displays as n leading blanks.
 
     def _make_blanks(self, n):
diff --git a/Lib/idlelib/format.py b/Lib/idlelib/format.py
index e11ca3a..bced4c1 100644
--- a/Lib/idlelib/format.py
+++ b/Lib/idlelib/format.py
@@ -6,6 +6,7 @@
 File renamed from paragraph.py with functions added from editor.py.
 """
 import re
+from tkinter.messagebox import askyesno
 from tkinter.simpledialog import askinteger
 from idlelib.config import idleConf
 
@@ -195,7 +196,7 @@
     return m.group(1)
 
 
-# Copy from editor.py; importing it would cause an import cycle.
+# Copied from editor.py; importing it would cause an import cycle.
 _line_indent_re = re.compile(r'[ \t]*')
 
 def get_line_indent(line, tabwidth):
@@ -209,7 +210,7 @@
 
 
 class FormatRegion:
-    "Format selected text."
+    "Format selected text (region)."
 
     def __init__(self, editwin):
         self.editwin = editwin
@@ -352,6 +353,65 @@
             maxvalue=16)
 
 
+# With mixed indents not allowed, these are semi-useless and not unittested.
+class Indents:  # pragma: no cover
+    "Change future indents."
+
+    def __init__(self, editwin):
+        self.editwin = editwin
+
+    def toggle_tabs_event(self, event):
+        editwin = self.editwin
+        usetabs = editwin.usetabs
+        if askyesno(
+              "Toggle tabs",
+              "Turn tabs " + ("on", "off")[usetabs] +
+              "?\nIndent width " +
+              ("will be", "remains at")[usetabs] + " 8." +
+              "\n Note: a tab is always 8 columns",
+              parent=editwin.text):
+            editwin.usetabs = not usetabs
+            # Try to prevent inconsistent indentation.
+            # User must change indent width manually after using tabs.
+            editwin.indentwidth = 8
+        return "break"
+
+    def change_indentwidth_event(self, event):
+        editwin = self.editwin
+        new = askinteger(
+                  "Indent width",
+                  "New indent width (2-16)\n(Always use 8 when using tabs)",
+                  parent=editwin.text,
+                  initialvalue=editwin.indentwidth,
+                  minvalue=2,
+                  maxvalue=16)
+        if new and new != editwin.indentwidth and not editwin.usetabs:
+            editwin.indentwidth = new
+        return "break"
+
+
+class Rstrip:  # 'Strip Trailing Whitespace" on "Format" menu.
+    def __init__(self, editwin):
+        self.editwin = editwin
+
+    def do_rstrip(self, event=None):
+        text = self.editwin.text
+        undo = self.editwin.undo
+        undo.undo_block_start()
+
+        end_line = int(float(text.index('end')))
+        for cur in range(1, end_line):
+            txt = text.get('%i.0' % cur, '%i.end' % cur)
+            raw = len(txt)
+            cut = len(txt.rstrip())
+            # Since text.delete() marks file as changed, even if not,
+            # only call it when needed to actually delete something.
+            if cut < raw:
+                text.delete('%i.%i' % (cur, cut), '%i.end' % cur)
+
+        undo.undo_block_stop()
+
+
 if __name__ == "__main__":
     from unittest import main
     main('idlelib.idle_test.test_format', verbosity=2, exit=False)
diff --git a/Lib/idlelib/idle_test/test_format.py b/Lib/idlelib/idle_test/test_format.py
index a2d27ed..c7b123e 100644
--- a/Lib/idlelib/idle_test/test_format.py
+++ b/Lib/idlelib/idle_test/test_format.py
@@ -6,6 +6,7 @@
 from test.support import requires
 from tkinter import Tk, Text
 from idlelib.editor import EditorWindow
+from idlelib.idle_test.mock_idle import Editor as MockEditor
 
 
 class Is_Get_Test(unittest.TestCase):
@@ -573,5 +574,50 @@
         self.assertEqual(ask(), 10)
 
 
+class rstripTest(unittest.TestCase):
+
+    def test_rstrip_line(self):
+        editor = MockEditor()
+        text = editor.text
+        do_rstrip = ft.Rstrip(editor).do_rstrip
+        eq = self.assertEqual
+
+        do_rstrip()
+        eq(text.get('1.0', 'insert'), '')
+        text.insert('1.0', '     ')
+        do_rstrip()
+        eq(text.get('1.0', 'insert'), '')
+        text.insert('1.0', '     \n')
+        do_rstrip()
+        eq(text.get('1.0', 'insert'), '\n')
+
+    def test_rstrip_multiple(self):
+        editor = MockEditor()
+        #  Comment above, uncomment 3 below to test with real Editor & Text.
+        #from idlelib.editor import EditorWindow as Editor
+        #from tkinter import Tk
+        #editor = Editor(root=Tk())
+        text = editor.text
+        do_rstrip = ft.Rstrip(editor).do_rstrip
+
+        original = (
+            "Line with an ending tab    \n"
+            "Line ending in 5 spaces     \n"
+            "Linewithnospaces\n"
+            "    indented line\n"
+            "    indented line with trailing space \n"
+            "    ")
+        stripped = (
+            "Line with an ending tab\n"
+            "Line ending in 5 spaces\n"
+            "Linewithnospaces\n"
+            "    indented line\n"
+            "    indented line with trailing space\n")
+
+        text.insert('1.0', original)
+        do_rstrip()
+        self.assertEqual(text.get('1.0', 'insert'), stripped)
+
+
 if __name__ == '__main__':
     unittest.main(verbosity=2, exit=2)
diff --git a/Lib/idlelib/idle_test/test_rstrip.py b/Lib/idlelib/idle_test/test_rstrip.py
deleted file mode 100644
index 2bc7c6f..0000000
--- a/Lib/idlelib/idle_test/test_rstrip.py
+++ /dev/null
@@ -1,53 +0,0 @@
-"Test rstrip, coverage 100%."
-
-from idlelib import rstrip
-import unittest
-from idlelib.idle_test.mock_idle import Editor
-
-class rstripTest(unittest.TestCase):
-
-    def test_rstrip_line(self):
-        editor = Editor()
-        text = editor.text
-        do_rstrip = rstrip.Rstrip(editor).do_rstrip
-
-        do_rstrip()
-        self.assertEqual(text.get('1.0', 'insert'), '')
-        text.insert('1.0', '     ')
-        do_rstrip()
-        self.assertEqual(text.get('1.0', 'insert'), '')
-        text.insert('1.0', '     \n')
-        do_rstrip()
-        self.assertEqual(text.get('1.0', 'insert'), '\n')
-
-    def test_rstrip_multiple(self):
-        editor = Editor()
-        #  Comment above, uncomment 3 below to test with real Editor & Text.
-        #from idlelib.editor import EditorWindow as Editor
-        #from tkinter import Tk
-        #editor = Editor(root=Tk())
-        text = editor.text
-        do_rstrip = rstrip.Rstrip(editor).do_rstrip
-
-        original = (
-            "Line with an ending tab    \n"
-            "Line ending in 5 spaces     \n"
-            "Linewithnospaces\n"
-            "    indented line\n"
-            "    indented line with trailing space \n"
-            "    ")
-        stripped = (
-            "Line with an ending tab\n"
-            "Line ending in 5 spaces\n"
-            "Linewithnospaces\n"
-            "    indented line\n"
-            "    indented line with trailing space\n")
-
-        text.insert('1.0', original)
-        do_rstrip()
-        self.assertEqual(text.get('1.0', 'insert'), stripped)
-
-
-
-if __name__ == '__main__':
-    unittest.main(verbosity=2)
diff --git a/Lib/idlelib/rstrip.py b/Lib/idlelib/rstrip.py
deleted file mode 100644
index f93b5e8..0000000
--- a/Lib/idlelib/rstrip.py
+++ /dev/null
@@ -1,29 +0,0 @@
-'Provides "Strip trailing whitespace" under the "Format" menu.'
-
-class Rstrip:
-
-    def __init__(self, editwin):
-        self.editwin = editwin
-
-    def do_rstrip(self, event=None):
-
-        text = self.editwin.text
-        undo = self.editwin.undo
-
-        undo.undo_block_start()
-
-        end_line = int(float(text.index('end')))
-        for cur in range(1, end_line):
-            txt = text.get('%i.0' % cur, '%i.end' % cur)
-            raw = len(txt)
-            cut = len(txt.rstrip())
-            # Since text.delete() marks file as changed, even if not,
-            # only call it when needed to actually delete something.
-            if cut < raw:
-                text.delete('%i.%i' % (cur, cut), '%i.end' % cur)
-
-        undo.undo_block_stop()
-
-if __name__ == "__main__":
-    from unittest import main
-    main('idlelib.idle_test.test_rstrip', verbosity=2,)
diff --git a/Misc/NEWS.d/next/IDLE/2019-03-21-08-35-00.bpo-36390.OdDCGk.rst b/Misc/NEWS.d/next/IDLE/2019-03-21-08-35-00.bpo-36390.OdDCGk.rst
index fabc75f..74bbda3 100644
--- a/Misc/NEWS.d/next/IDLE/2019-03-21-08-35-00.bpo-36390.OdDCGk.rst
+++ b/Misc/NEWS.d/next/IDLE/2019-03-21-08-35-00.bpo-36390.OdDCGk.rst
@@ -1,2 +1,2 @@
-Rename paragraph.py to format.py and add region formatting methods
-from editor.py.  Add tests for the latter.
+Gather Format menu functions into format.py.  Combine
+paragraph.py, rstrip.py, and format methods from editor.py.