diff --git a/src/12-typeclasses.md b/src/12-typeclasses.md
index fb1297f6f1587ee481e959227554cb1adc1a9cf7..99dfdd7114fbe1af1b898f1f63d82839f0b9cced 100644
--- a/src/12-typeclasses.md
+++ b/src/12-typeclasses.md
@@ -65,4 +65,4 @@ boolify 0 ~> False
 boolify 1 ~> True
 boolify [] ~> False
 boolify [1,2,3,4] ~> True
-```
\ No newline at end of file
+```
diff --git a/src/13-functors.md b/src/13-functors.md
index 8fb5bdbe3966e792303ea026e54ec98f1739fa3d..da3448129c1ddcbd4f28132d633c23c3ad7fa746 100644
--- a/src/13-functors.md
+++ b/src/13-functors.md
@@ -38,8 +38,7 @@ a = (==2) <$> (*2) <$> [1,2,3]
 
 `:i Functor`
 
-→ `Maybe`, `(,) a`, `(->) r` 
+→ `Maybe`, `(,) a`, `(->) r`
 
 
 **Exercise:** Try around with mapping on `Maybe` and lists. Implement `Functor` for `List`, our own list type.
-
diff --git a/src/14-monads.md b/src/14-monads.md
index 7043583da00b1db338939220a7ceaf29405519d9..3a6802025193484dd2fddaebbdbf72b23367036f 100644
--- a/src/14-monads.md
+++ b/src/14-monads.md
@@ -62,4 +62,4 @@ main :: IO ()
 main = putStrLn "What is your name?"
   >>= \_ -> getLine
   >>= \name -> putStrLn ("Hello " ++ name ++ "!")
-```
\ No newline at end of file
+```
diff --git a/src/15-project-management.md b/src/15-project-management.md
index 83cb1a5d89aaf3da1588ed43e4b41d92d36a4561..3fe215813f28046e33245d8c0814209051a2b5f8 100644
--- a/src/15-project-management.md
+++ b/src/15-project-management.md
@@ -18,4 +18,4 @@ Install using your package manager, the Windows installer or the command in the
 ## Important files
 
 - `package.yaml`
-- `stack.yaml`
\ No newline at end of file
+- `stack.yaml`