gui: Fix spelling error in user-visible string.

diff --git a/src/ui/gui/psppire-output-window.c b/src/ui/gui/psppire-output-window.c
index 0dacd134bc2c1eddb7aaf0631bb70302907c0e05..62185befa9b177a3f337cdcd65453cf827ae67d1 100644 (file)
--- a/src/ui/gui/psppire-output-window.c
+++ b/src/ui/gui/psppire-output-window.c
@@ -453,7 +453,7 @@ enum
 #define N_EXTENTIONS (n_FT - 1)
 
 struct file_types ft[n_FT] = {
-  {N_("Infer file type from extention"),  NULL},
+  {N_("Infer file type from extension"),  NULL},
   {N_("PDF (*.pdf)"),                     ".pdf"},
   {N_("HTML (*.html)"),                   ".html"},
   {N_("OpenDocument (*.odt)"),            ".odt"},