dhallPackages.buildDhallUrl: small formatting fixes

Co-authored-by: Sandro <sandro.jaeckel@gmail.com>

doc/languages-frameworks/dhall.section.md

@@ -345,7 +345,7 @@ $ dhall-to-nixpkgs directory ~/proj/dhall-semver
 ### Remote imports as fixed-output derivations {#ssec-dhall-remote-imports-as-fod}
 
 `dhall-to-nixpkgs` has the ability to fetch and build remote imports as
-fixed-output derivations by using their Dhall integrity check.  This is
+fixed-output derivations by using their Dhall integrity check. This is
 sometimes easier than manually packaging all remote imports.
 
 This can be used like the following:

pkgs/development/interpreters/dhall/build-dhall-url.nix

@@ -79,12 +79,10 @@ in
   runCommand name { } (''
     set -eu
 
-    mkdir -p ${cacheDhall}
+    mkdir -p ${cacheDhall} $out/${cacheDhall}
 
     export XDG_CACHE_HOME=$PWD/${cache}
 
-    mkdir -p $out/${cacheDhall}
-
     SHA_HASH="${dhall-hash}"
 
     HASH_FILE="''${SHA_HASH/sha256:/1220}"

pkgs/test/dhall/default.nix

@@ -3,4 +3,3 @@
 lib.recurseIntoAttrs {
   buildDhallUrl = callPackage ./buildDhallUrl { };
 }
-