[gimp/gimp-2-10] Add a few more misc. source comment typos

[Jehan <jehanp src gnome org>]

commit ce92efa82e884d77ee950cdde4fb3b4f6d956c73
Author: luz.paz <luzpaz users noreply github com>
Date:   Fri Apr 19 22:51:06 2019 -0400

    Add a few more misc. source comment typos
    
    
    (cherry picked from commit 1c91b8d97eb7a8f159b5c232f9159328df6558e3)

 app/display/gimptoolrectangle.c        | 2 +-
 app/widgets/gimpviewrendererdrawable.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/app/display/gimptoolrectangle.c b/app/display/gimptoolrectangle.c
index 3cecea008d..309cf8cd48 100644
--- a/app/display/gimptoolrectangle.c
+++ b/app/display/gimptoolrectangle.c
@@ -227,7 +227,7 @@ struct _GimpToolRectanglePrivate
   /* The title for the statusbar coords */
   gchar                  *status_title;
 
-  /* For saving in case of cancelation. */
+  /* For saving in case of cancellation. */
   gdouble                 saved_x1;
   gdouble                 saved_y1;
   gdouble                 saved_x2;
diff --git a/app/widgets/gimpviewrendererdrawable.c b/app/widgets/gimpviewrendererdrawable.c
index a44df83bec..2045c9b607 100644
--- a/app/widgets/gimpviewrendererdrawable.c
+++ b/app/widgets/gimpviewrendererdrawable.c
@@ -352,7 +352,7 @@ gimp_view_renderer_drawable_cancel_render (GimpViewRendererDrawable *renderdrawa
    * let it go on without blocking the main thread.
    * gimp_drawable_get_sub_preview_async() can continue rendering safely even
    * after the drawable had died, and our completion callback is prepared to
-   * handle cancelation.
+   * handle cancellation.
    */
   if (renderdrawable->priv->render_async)
     {