Fix minor typos

Doc/lib/tkinter.tex

@@ -894,11 +894,11 @@ Bitmap/Pixelmap images can be created through the subclasses of
 Either type of image is created through either the \code{file} or the
 \code{data} option (other options are available as well).
 
-The image object can then be used whereever an \code{image} option is
+The image object can then be used where ever an \code{image} option is
 supported by some widget (e.g. labels, buttons, menus). In these
 cases, Tk will not keep a reference to the image. When the last Python
 reference to the image object is deleted, the image data is deleted as
-well, and Tk will display an empty box wheerever the image was used.
+well, and Tk will display an empty box where ever the image was used.
 
 \section{\module{Tix} ---
          Extension widgets for Tk}