docs: Fix return value for g_datetime_compare()

Previous code confused dt1 and dt2. The new formulation is stolen from
man strcmp() and g_strcmp0().

diff --git a/glib/gdatetime.c b/glib/gdatetime.c
index 0c47006..2957817 100644 (file)
--- a/glib/gdatetime.c
+++ b/glib/gdatetime.c
@@ -1319,8 +1319,8 @@ g_date_time_add_full (GDateTime *datetime,
  * #GCompareFunc-compatible comparison for #GDateTime<!-- -->'s. Both
  * #GDateTime<-- -->'s must be non-%NULL.
  *
- * Return value: 0 for equal, less than zero if dt1 is less than dt2, greater
- *   than zero if dt2 is greator than dt1.
+ * Returnsvalue: -1, 0 or 1 if @dt1 is less than, equal to or greater
+ *   than @dt2.
  *
  * Since: 2.26
  */