docs: use apostrophe in *'ve

gtk/gtkcontainer.c

@@ -1906,7 +1906,7 @@ gtk_container_real_check_resize (GtkContainer *container)
 /* The container hasn't changed size but one of its children
  *  queued a resize request. Which means that the allocation
  *  is not sufficient for the requisition of some child.
- *  We've already performed a size request at this point,
+ *  We’ve already performed a size request at this point,
  *  so we simply need to reallocate and let the allocation
  *  trickle down via GTK_WIDGET_ALLOC_NEEDED flags.
  */

gtk/gtkdialog.c

@@ -121,7 +121,7 @@
  *                              G_CALLBACK (gtk_widget_destroy),
  *                              dialog);
  *
- *    /* Add the label, and show everything we've added to the dialog */
+ *    /* Add the label, and show everything we’ve added to the dialog */
  *
  *    gtk_container_add (GTK_CONTAINER (content_area), label);
  *    gtk_widget_show_all (dialog);

gtk/gtkdnd.c

@@ -3691,7 +3691,7 @@ _gtk_drag_source_handle_event (GtkWidget *widget,
 
 /*************************************************************
  * gtk_drag_source_check_selection:
- *     Check if we've set up handlers/claimed the selection
+ *     Check if we’ve set up handlers/claimed the selection
  *     for a given drag. If not, add them.
  *   arguments:
  *     

gtk/gtkmain.c

@@ -44,7 +44,7 @@
  *
  * When widgets receive an event, they frequently emit one or more
  * “signals”. Signals notify your program that "something
- * interesting happened" by invoking functions you've connected to the signal
+ * interesting happened" by invoking functions you’ve connected to the signal
  * with g_signal_connect(). Functions connected to a signal are often termed
  * “callbacks”.
  *

gtk/gtkpapersize.c

@@ -708,7 +708,7 @@ gtk_paper_size_get_default (void)
  * larger than most printers margins, so that it will be within
  * the imageble area on any printer.
  *
- * I've taken the actual values used from the OSX page setup dialog.
+ * I’ve taken the actual values used from the OSX page setup dialog.
  * I'm not sure exactly where they got these values for, but might
  * correspond to this (from ghostscript docs):
  *

gtk/gtkprintsettings.c

@@ -36,7 +36,7 @@
  *
  * A GtkPrintSettings object represents the settings of a print dialog in
  * a system-independent way. The main use for this object is that once
- * you've printed you can get a settings object that represents the settings
+ * you’ve printed you can get a settings object that represents the settings
  * the user chose, and the next time you print you can pass that object in so
  * that the user doesn’t have to re-set all his settings.
  *

gtk/gtktoolbar.c

@@ -3091,7 +3091,7 @@ gtk_toolbar_finalize (GObject *object)
  * @icon_size: The #GtkIconSize that stock icons in the toolbar shall have.
  *
  * This function sets the size of stock icons in the toolbar. You
- * can call it both before you add the icons and after they've been
+ * can call it both before you add the icons and after they’ve been
  * added. The size you set will override user preferences for the default
  * icon size.
  * 

gtk/gtkwidget.c

@@ -4285,7 +4285,7 @@ gtk_widget_unparent (GtkWidget *widget)
  * #GtkWindow), it will be removed from the list of toplevels, and the
  * reference GTK+ holds to it will be removed. Removing a
  * widget from its container or the list of toplevels results in the
- * widget being finalized, unless you've added additional references
+ * widget being finalized, unless you’ve added additional references
  * to the widget with g_object_ref().
  *
  * In most cases, only toplevel widgets (windows) require explicit