Convert a pile of obvious "yes/no" functions to return bool.
diff --git a/Tools/idle/ReplaceDialog.py b/Tools/idle/ReplaceDialog.py
index 83462f9..1e46f36 100644
--- a/Tools/idle/ReplaceDialog.py
+++ b/Tools/idle/ReplaceDialog.py
@@ -111,24 +111,24 @@
 
     def do_find(self, ok=0):
         if not self.engine.getprog():
-            return 0
+            return False
         text = self.text
         res = self.engine.search_text(text, None, ok)
         if not res:
             text.bell()
-            return 0
+            return False
         line, m = res
         i, j = m.span()
         first = "%d.%d" % (line, i)
         last = "%d.%d" % (line, j)
         self.show_hit(first, last)
         self.ok = 1
-        return 1
+        return True
 
     def do_replace(self):
         prog = self.engine.getprog()
         if not prog:
-            return 0
+            return False
         text = self.text
         try:
             first = pos = text.index("sel.first")
@@ -141,7 +141,7 @@
         chars = text.get("%d.0" % line, "%d.0" % (line+1))
         m = prog.match(chars, col)
         if not prog:
-            return 0
+            return False
         new = self._expand(m, self.replvar.get())
         text.mark_set("insert", first)
         text.undo_block_start()
@@ -152,7 +152,7 @@
         text.undo_block_stop()
         self.show_hit(first, text.index("insert"))
         self.ok = 0
-        return 1
+        return True
 
     def _expand(self, m, template):
         # XXX This code depends on internals of the regular expression