Fix a bug I introduced which causes all block openers at an  indent level
to be shown, instead of outdenting each level.
diff --git a/Lib/idlelib/CodeContext.py b/Lib/idlelib/CodeContext.py
index d8f9237..f2fda41 100644
--- a/Lib/idlelib/CodeContext.py
+++ b/Lib/idlelib/CodeContext.py
@@ -100,7 +100,7 @@
             indent, text, opener = self.get_line_info(line_index)
             if indent < lastindent:
                 lastindent = indent
-                if opener == "else" or "elif":
+                if opener in ("else", "elif"):
                     # We also show the if statement
                     lastindent += 1
                 if opener and line_index < firstline: