[gnome-calculator] Removed duplicate the (fixes #198)

[Robert Roth <robertroth src gnome org>]

commit 0eee7bfcb0c68dd56d1399bbb13717aa1cba71dc
Author: Robert Roth <robert roth off gmail com>
Date:   Mon Nov 30 14:20:26 2020 +0200

    Removed duplicate the (fixes #198)

 help/C/superscript.page | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/help/C/superscript.page b/help/C/superscript.page
index 628b41c2..f7e1f20b 100644
--- a/help/C/superscript.page
+++ b/help/C/superscript.page
@@ -27,7 +27,7 @@
     </p>
     </example>
     <p>
-    To enter superscript numbers with the mouse select the number mode using the the <gui>↑n</gui> and 
<gui>↓n</gui> buttons (available in the <gui>Advanced Mode</gui> and the <gui>Programming Mode</gui>).
+    To enter superscript numbers with the mouse select the number mode using the <gui>↑n</gui> and 
<gui>↓n</gui> buttons (available in the <gui>Advanced Mode</gui> and the <gui>Programming Mode</gui>).
     When one of these modes is active clicking the number buttons will enter numbers in superscript or 
subscript.
     To return to normal number mode click the active number button.
     </p>