[gcalctool] Fix spelling errors

[Robert Ancell <rancell src gnome org>]

commit fbbea7f97c4470f1f89189e76638651d39113cf8
Author: Robert Ancell <robert ancell gmail com>
Date:   Sat Jun 12 15:43:19 2010 +1000

    Fix spelling errors

 src/math-buttons.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/math-buttons.c b/src/math-buttons.c
index 992497d..0ea8a36 100644
--- a/src/math-buttons.c
+++ b/src/math-buttons.c
@@ -106,7 +106,7 @@ static ButtonData button_data[] = {
       N_("Pi [Ctrl+P]")},
     {"eulers_number",      "e", NUMBER,
       /* Tooltip for the Euler's Number button */
-      N_("Eulers Number")},
+      N_("Eulerâ??s Number")},
     {"imaginary",          "i", NUMBER, NULL},
     {"numeric_point", NULL, NUMBER, NULL},
     {"subscript", NULL, NUMBER_BOLD,
@@ -114,7 +114,7 @@ static ButtonData button_data[] = {
       N_("Subscript mode [Alt]")},
     {"superscript", NULL, NUMBER_BOLD,
       /* Tooltip for the superscript button */
-      N_("Supercript mode [Ctrl]")},
+      N_("Superscript mode [Ctrl]")},
     {"exponential", NULL, NUMBER_BOLD,
       /* Tooltip for the scientific exponent button */
       N_("Scientific exponent [Ctrl+E]")},