Bug #1594742: wrong word in stringobject doc.

 (backport from rev. 52731)

Doc/lib/libstdtypes.tex

@@ -834,7 +834,7 @@ boundaries.  Line breaks are not included in the resulting list unless
                                        start\optional{, end}}}
 Return \code{True} if string starts with the \var{prefix}, otherwise
 return \code{False}.  \var{prefix} can also be a tuple of
-suffixes to look for.  With optional \var{start}, test string beginning at
+prefixes to look for.  With optional \var{start}, test string beginning at
 that position.  With optional \var{end}, stop comparing string at that
 position.