[gtkmm] Application: Fix arguements->arguments typos.

[Murray Cumming <murrayc src gnome org>]

commit 87467920e45affc8fa4efb9dd3485fe478092506
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed Mar 4 21:58:00 2015 +0100

    Application: Fix arguements->arguments typos.

 gtk/src/application.hg |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtk/src/application.hg b/gtk/src/application.hg
index 2230e07..4a7ca62 100644
--- a/gtk/src/application.hg
+++ b/gtk/src/application.hg
@@ -138,7 +138,7 @@ protected:
    * This initializes gtkmm (and the GObject type system) for you, parsing the
    * standard GTK+ command line arguments.
    *
-   * You could instead use the constructor that takes no command line arguements
+   * You could instead use the constructor that takes no command line arguments
    * and later supply the command line arguments to run().
    *
    * Note that all GTK+ functionality that is available via command line arguments
@@ -186,7 +186,7 @@ public:
    * This initializes gtkmm (and the GObject type system) for you, parsing the
    * standard GTK+ command line arguments.
    *
-   * You could instead use the constructor that takes no command line arguements
+   * You could instead use the constructor that takes no command line arguments
    * and later supply the command line arguments to run().
    *
    * Note that all GTK+ functionality that is available via command line arguments