diff --git a/Text/PrettyPrint/Free/Internal.hs b/Text/PrettyPrint/Free/Internal.hs
--- a/Text/PrettyPrint/Free/Internal.hs
+++ b/Text/PrettyPrint/Free/Internal.hs
@@ -120,7 +120,6 @@
 import Data.String
 import Data.Foldable hiding (fold)
 import Data.Traversable
-import Data.Monoid
 import Data.Functor.Apply
 import Data.Functor.Bind
 import Data.Functor.Plus
@@ -336,7 +335,7 @@
 -- next to each other (with a @space@ in between) or underneath each
 -- other. (infixr 5)
 (</>) :: Doc e -> Doc e -> Doc e
-x </> y         = x <> softline <> y
+x </> y = x <> softline <> y
 
 -- | The document @(x \<\/\/\> y)@ concatenates document @x@ and @y@ with
 -- a 'softbreak' in between. This effectively puts @x@ and @y@ either
@@ -921,7 +920,7 @@
       --nicest :: r = ribbon width, w = page width,
       --          n = indentation of current line, k = current column
       --          x and y, the (simple) documents to chose from.
-      --          precondition: first lines of x are longer than the first lines of y.
+      --          precondition: first line of x are longer than the first line of y.
       nicest n k x' y | fits wid x' = x'
                       | otherwise  = y
                         where
diff --git a/wl-pprint-extras.cabal b/wl-pprint-extras.cabal
--- a/wl-pprint-extras.cabal
+++ b/wl-pprint-extras.cabal
@@ -1,6 +1,6 @@
 name:          wl-pprint-extras
 category:      Control, Monads, Text
-version:       1.6
+version:       1.6.1
 cabal-version: >= 1.6
 license:       BSD3
 license-file:  LICENSE
@@ -20,15 +20,15 @@
 
 library
 
-  build-depends: 
-    base          >= 4     && < 5,
-    containers    >= 0.4   && < 0.5,
-    semigroups    >= 0.8   && < 0.9,
-    semigroupoids >= 1.2.6 && < 1.3,
-    utf8-string   >= 0.3.6 && < 0.4
+  build-depends:
+    base          >= 4       && < 5,
+    containers    >= 0.4     && < 0.5,
+    semigroups    >= 0.8     && < 0.9,
+    semigroupoids >= 1.2.6.1 && < 1.3,
+    utf8-string   >= 0.3.6   && < 0.4
 
   exposed-modules:
     Text.PrettyPrint.Free
     Text.PrettyPrint.Free.Internal
 
-  ghc-options:      -Wall 
+  ghc-options:      -Wall