docs: Improve grammar in GtkHeaderBar overview

diff --git a/gtk/gtkheaderbar.c b/gtk/gtkheaderbar.c
index 36c7e7008140978cfe30c15ed2b819bd6b1834a8..a1769f4732dfadd254f709547e76ac78271dbd3c 100644 (file)
--- a/gtk/gtkheaderbar.c
+++ b/gtk/gtkheaderbar.c
@@ -37,8 +37,8 @@
  * @Title: GtkHeaderBar
  * @See_also: #GtkBox, #GtkActionBar
  *
- * GtkHeaderBar is similar to a horizontal #GtkBox, it allows to place
- * children at the start or the end. In addition, it allows a title and
+ * GtkHeaderBar is similar to a horizontal #GtkBox. It allows children to 
+ * be placed at the start or the end. In addition, it allows a title and
  * subtitle to be displayed. The title will be centered with respect to
  * the width of the box, even if the children at either side take up
  * different amounts of space. The height of the titlebar will be