[glibmm] Glib::ustring documentation: Minor fix

[Kjell Ahlstedt <kjellahl src gnome org>]

commit b1675455204e03b7e308809a61a851063f3f118c
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Wed Sep 18 10:13:09 2019 +0200

    Glib::ustring documentation: Minor fix

 glib/glibmm/ustring.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/glib/glibmm/ustring.h b/glib/glibmm/ustring.h
index 746a304d..a5bfca48 100644
--- a/glib/glibmm/ustring.h
+++ b/glib/glibmm/ustring.h
@@ -761,7 +761,7 @@ public:
    *   greeting, name, your_cows, cow_percentage, my_cows);
    *
    * std::cout << text;
-   * // Hi, Dennis! You have 2 cows. That's about 27.27% of the 11 cows I have.
+   * // Hi, Dennis! You have 3 cows. That's about 27.27% of the 11 cows I have.
    * @endcode
    *
    * @param fmt The template string, in the format used by <tt>printf()</tt> et al.
@@ -774,7 +774,7 @@ public:
   template <class... Ts>
   static inline ustring sprintf(const ustring& fmt, const Ts&... args);
 
-  /* Overload of sprintf() taking a string literal.
+  /*! Overload of sprintf() taking a string literal.
    *
    * The main benefit of this is not constructing a temporary ustring if @p fmt
    * is a string literal. A secondary effect is that it might encourage compilers