SF bug #892854: typo in textwrap doc page

(Reported by Drew Perttula.)

Doc/lib/libtextwrap.tex

@@ -47,7 +47,7 @@ remove indentation from strings that have unwanted whitespace to the
 left of the text.
 
 \begin{funcdesc}{dedent}{text} 
-Remove any whitespace than can be uniformly removed from the left
+Remove any whitespace that can be uniformly removed from the left
 of every line in \var{text}.
 
 This is typically used to make triple-quoted strings line up with