[gtkmm] Gtk::FileFilter: Don't use /* in a comment starting with /*

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 92d848db465de1428fbb7f23bfe3638bda163ad7
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Tue Jan 8 12:42:01 2019 +0100

    Gtk::FileFilter: Don't use /* in a comment starting with /*
    
    Compilation error: "/*" within comment [-Werror=comment]

 gtk/src/filefilter.hg | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/src/filefilter.hg b/gtk/src/filefilter.hg
index b892873a..aa3a88bd 100644
--- a/gtk/src/filefilter.hg
+++ b/gtk/src/filefilter.hg
@@ -35,7 +35,7 @@ namespace Gtk
  * e.g. a filter for <tt>text/plain</tt> also matches a file with MIME type
  * <tt>application/rtf</tt>, since <tt>application/rtf</tt> is a subclass of
  * <tt>text/plain</tt>. Note that Gtk::FileFilter allows wildcards for the
- * subtype of a MIME type, so you can e.g. filter for <tt>image/*</tt>.
+ * subtype of a MIME type, so you can e.g. filter for <tt>image/ *</tt>.
  *
  * Filters are used by adding them to a Gtk::FileChooser. See Gtk::FileChooser::add_filter().
  */