Update doc/how-to-package-haskell-code.rst

Co-authored-by: brandon s allbery kf8nh <[email protected]>

doc/how-to-package-haskell-code.rst

@@ -206,7 +206,7 @@ Modules imported from other packages
 While your library or executable may include a number of modules, it
 almost certainly also imports a number of external modules from the
 standard libraries or other pre-packaged libraries. (These other
-libraries are of course just Cabal packages that contain a library.)
+libraries are of course just Cabal packages that contain one or more libraries.)
 
 You have to list all of the library packages that your library or
 executable imports modules from. Or to put it another way: you have to