gnu: clitest: Fix test failure with newer grep.

* gnu/packages/patches/clitest-grep-compat.patch: New file.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
* gnu/packages/check.scm (clitest)[source](patches): New field.
[arguments]: While at it, remove obsolete substitution.

gnu/local.mk

@@ -1000,6 +1000,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/classpath-aarch64-support.patch		\
   %D%/packages/patches/classpath-miscompilation.patch		\
   %D%/packages/patches/cling-use-shared-library.patch		\
+  %D%/packages/patches/clitest-grep-compat.patch		\
   %D%/packages/patches/clog-fix-shared-build.patch		\
   %D%/packages/patches/clucene-pkgconfig.patch			\
   %D%/packages/patches/cmake-curl-certificates-3.24.patch	\

gnu/packages/check.scm

@@ -310,6 +310,7 @@ (define-public clitest
               (method git-fetch)
               (uri (git-reference (url home-page) (commit version)))
               (file-name (git-file-name name version))
+              (patches (search-patches "clitest-grep-compat.patch"))
               (sha256
                (base32
                 "1p745mxiq3hgi3ywfljs5sa1psi06awwjxzw0j9c2xx1b09yqv4a"))))
@@ -325,13 +326,6 @@ (define-public clitest
           (replace 'check
             (lambda* (#:key tests? #:allow-other-keys)
               (when tests?
-                (substitute* "test.md"
-                  ;; One test looks for an error from grep in the form "grep: foo",
-                  ;; but our grep returns the absolute file name on errors.  Adjust
-                  ;; the test to cope with that.
-                  (("sed 's/\\^e\\*grep: \\.\\*/")
-                   "sed 's/.*e*grep: .*/"))
-
                 (setenv "HOME" "/tmp")
                 (invoke "./clitest" "test.md"))))
           (replace 'install

gnu/packages/patches/clitest-grep-compat.patch

@@ -0,0 +1,27 @@
+Suppress a warning from grep which causes tests to fail.
+
+Taken from upstream pull request:
+
+  https://github.com/aureliojargas/clitest/pull/54
+
+diff --git a/test/inline-match-egrep.sh b/test/inline-match-egrep.sh
+--- a/test/inline-match-egrep.sh
++++ b/test/inline-match-egrep.sh
+@@ -42,7 +42,7 @@ $ printf ' \t  \t\t   \n'       #=> --egrep ^ 	  		   $
+ # egrep regexes. You'll need to test in your system if that's the
+ # case. I recommend using a literal tab to avoid problems.
+ 
+-$ printf 'may\tfail'            #=> --egrep ^may\tfail$
++$ printf 'may\tfail'            #=> --egrep ^may\\tfail$
+ $ printf 'may\tfail'            #=> --egrep ^may[\t]fail$
+ $ printf 'will\tmatch'          #=> --egrep ^will	match$
+ 
+@@ -51,7 +51,7 @@ $ printf 'will\tmatch'          #=> --egrep ^will	match$
+ # These tests will fail:
+ 
+ $ printf 'will\nfail'           #=> --egrep will.*fail
+-$ printf 'will\nfail'           #=> --egrep will\nfail
++$ printf 'will\nfail'           #=> --egrep will\\nfail
+ 
+ # If one line of a multiline results matches, the test is OK
+