Improve guix declaration

guix.scm

@@ -4,22 +4,19 @@
              (guix licenses)
              (guix packages))
 
-(let
-  ((%source-dir (dirname (current-filename))))
+(let ((%source-dir (dirname (current-filename))))
   (package
     (name "sjw-wtk")
     (version "devel")
-    (source
-    (local-file %source-dir
-          #:recursive? #t
-          #:select? (git-predicate %source-dir)))
+    (source (local-file %source-dir
+                        #:recursive? #t
+                        #:select? (git-predicate %source-dir)))
     (build-system copy-build-system)
     (arguments
-      '(#:install-plan
-        '(("src" "lib/SJW/WTK"))))
+     '(#:install-plan '(("src" "lib/SJW/WTK"))))
     (home-page "https://git.marvid.fr/Tissevert/WTK")
     (synopsis "The Web Tool Kit")
     (description
-			"The Web Tool Kit aims at providing high-level abstraction modules to
-			build web applications easily.")
+     "The Web Tool Kit aims at providing high-level abstraction modules to
+      build web applications easily.")
     (license gpl3+)))