gnu: ocaml-qcheck: Update to 0.18.

* gnu/packages/ocaml.scm (ocaml-qcheck): Update to 0.18.
* gnu/packages/patches/ocaml-qcheck-fix-test-whitespace.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.

gnu/local.mk

@@ -1533,6 +1533,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/ocaml-dose3-Fix-for-ocaml-4.06.patch	\
   %D%/packages/patches/ocaml-dose3-dont-make-printconf.patch	\
   %D%/packages/patches/ocaml-dose3-Install-mli-cmx-etc.patch	\
+  %D%/packages/patches/ocaml-qcheck-fix-test-whitespace.patch	\
   %D%/packages/patches/omake-fix-non-determinism.patch	\
   %D%/packages/patches/oneko-remove-nonfree-characters.patch	\
   %D%/packages/patches/onnx-optimizer-system-library.patch	\

gnu/packages/ocaml.scm

@@ -1552,16 +1552,17 @@ archive(native) = \"frontc.cmxa\""))))
 (define-public ocaml-qcheck
   (package
     (name "ocaml-qcheck")
-    (version "0.12")
+    (version "0.18")
     (source
      (origin
        (method git-fetch)
        (uri (git-reference
              (url "https://github.com/c-cube/qcheck")
-             (commit version)))
+             (commit (string-append "v" version))))
        (file-name (git-file-name name version))
+       (patches (search-patches "ocaml-qcheck-fix-test-whitespace.patch"))
        (sha256
-        (base32 "1llnfynhlndwyjig7wrayjnds2b3mggp5lw20dwxhn2i2lkkb22m"))))
+        (base32 "1s652hrj2sxqj30dfl300zjvvqk3r62a1bnzqw1hqyf6pi88qn8x"))))
     (build-system dune-build-system)
     (arguments
      `(#:test-target "."
@@ -1577,6 +1578,7 @@ archive(native) = \"frontc.cmxa\""))))
        ("ocaml-ounit" ,ocaml-ounit)))
     (native-inputs
      `(("ocamlbuild" ,ocamlbuild)))
+    (properties `((ocaml4.07-variant . ,(delay ocaml4.07-qcheck))))
     (home-page "https://github.com/c-cube/qcheck")
     (synopsis "QuickCheck inspired property-based testing for OCaml")
     (description "QuickCheck inspired property-based testing for OCaml. This
@@ -1585,6 +1587,22 @@ generated instances of the type. It provides combinators for generating
 instances and printing them.")
     (license license:lgpl3+)))
 
+(define-public ocaml4.07-qcheck
+  (package-with-ocaml4.07
+    (package
+      (inherit ocaml-qcheck)
+      (version "0.12")
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url "https://github.com/c-cube/qcheck")
+                      (commit version)))
+                (file-name (git-file-name "ocaml-qcheck" version))
+                (sha256
+                 (base32
+                  "1llnfynhlndwyjig7wrayjnds2b3mggp5lw20dwxhn2i2lkkb22m"))))
+      (properties '()))))
+
 (define-public ocaml-qtest
   (package
     (name "ocaml-qtest")

gnu/packages/patches/ocaml-qcheck-fix-test-whitespace.patch

@@ -0,0 +1,24 @@
+From 0cb666fffcbeb78c8c14d271b3ba65ea514bfc44 Mon Sep 17 00:00:00 2001
+From: Julien Lepiller <julien@lepiller.eu>
+Date: Fri, 19 Nov 2021 03:03:21 +0100
+Subject: [PATCH] Fix whitespace issue in test
+
+---
+ example/alcotest/output.txt.expected | 1 -
+ 1 file changed, 1 deletion(-)
+
+diff --git a/example/alcotest/output.txt.expected b/example/alcotest/output.txt.expected
+index bde0b83..9f1417c 100644
+--- a/example/alcotest/output.txt.expected
++++ b/example/alcotest/output.txt.expected
+@@ -16,7 +16,6 @@ test `fail_sort_id` failed on ≥ 1 cases: [1; 0] (after 20 shrink steps)
+ [exception] test `fail_sort_id` failed on ≥ 1 cases: [1; 0] (after 20 shrink steps)
+                                            
+             
+-
+  ──────────────────────────────────────────────────────────────────────────────
+ 
+ 3 failures! 5 tests run.
+-- 
+2.33.1
+