Remove tabs from the documentation.
diff --git a/Doc/howto/curses.rst b/Doc/howto/curses.rst
index 0600ea6..2d964c3 100644
--- a/Doc/howto/curses.rst
+++ b/Doc/howto/curses.rst
@@ -297,7 +297,7 @@
 could code::
 
    stdscr.addstr(0, 0, "Current mode: Typing mode",
-   	      curses.A_REVERSE)
+                 curses.A_REVERSE)
    stdscr.refresh()
 
 The curses library also supports color on those terminals that provide it, The