Fix mangled sentence

Doc/lib/liblinecache.tex

@@ -38,7 +38,7 @@ files previously read using \function{getline()}.
 \begin{funcdesc}{checkcache}{\optional{filename}}
 Check the cache for validity.  Use this function if files in the cache 
 may have changed on disk, and you require the updated version.  If
-\var{filename} is omitted, it will check the whole cache entries.
+\var{filename} is omitted, it will check all the entries in the cache.
 \end{funcdesc}
 
 Example: