Remove stray escapes to avoid warnings from grep 3.8 which breaks
expected test output.

diff --git a/testsuite/tests/hsc2hs/Makefile b/testsuite/tests/hsc2hs/Makefile
--- a/testsuite/tests/hsc2hs/Makefile
+++ b/testsuite/tests/hsc2hs/Makefile
@@ -47,5 +47,5 @@ T12504:
 ifeq "$(WINDOWS)" "YES"
 	grep '{-# LINE 1 \"T12504\\\\path\\\\to\\\\$@\.hsc\" #-}' T12504/path/to/$@.hs
 else
-	grep '{-# LINE 1 \"T12504/path/to/$@\.hsc\" #-}' T12504/path/to/$@.hs
+	grep '{-# LINE 1 "T12504/path/to/$@\.hsc" #-}' T12504/path/to/$@.hs
 endif
diff --git a/testsuite/tests/numeric/should_run/T7014.primops b/testsuite/tests/numeric/should_run/T7014.primops
--- a/testsuite/tests/numeric/should_run/T7014.primops
+++ b/testsuite/tests/numeric/should_run/T7014.primops
@@ -1,8 +1,8 @@
 and#
 or#
 uncheckedShift.*#
-\+#
-\-#
++#
+-#
 \*#
 quotInt#
 remInt#
diff --git a/testsuite/tests/simplCore/should_compile/Makefile b/testsuite/tests/simplCore/should_compile/Makefile
--- a/testsuite/tests/simplCore/should_compile/Makefile
+++ b/testsuite/tests/simplCore/should_compile/Makefile
@@ -226,7 +226,7 @@ str-rules:
 # g should have been collapsed into one defininition by CSE.
 .PHONY: T13340
 T13340:
-	'$(TEST_HC)' $(TEST_HC_OPTS) -c -O T13340.hs -ddump-simpl -dsuppress-all | grep -c '\+#'
+	'$(TEST_HC)' $(TEST_HC_OPTS) -c -O T13340.hs -ddump-simpl -dsuppress-all | grep -c '+#'
 
 
 # We expect to see all dictionaries specialized away.
f/gnu/packages/ipfs.scm?id=0be51fe03bf2b8f3ef009929fa0860e17aa15de4'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/ipfs.scm'>
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<tr><td><span title='2023-10-05 23:14:55 +0200'>2023-10-05</span></td><td><a href='/guix/commit/gnu/packages/ipfs.scm?id=45fbcc452f60a55ea716d377d8c51159ce552133'>gnu: go-ipfs: Update to 0.14.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ipfs.scm (go-ipfs): Update to 0.14.0.
  [source]: Change "go-ipfs" to "kubo" in the source link.
  [arguments]: Rename "go-ipfs" to "kubo".

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Artyom V. Poptsov</td></tr>
<tr><td><span title='2023-09-14 23:43:19 +0200'>2023-09-14</span></td><td><a href='/guix/commit/gnu/packages/ipfs.scm?id=1149cc1b9f2f3124f890c76497b826d7f959cec2'>gnu: go-ipfs: Update to 0.13.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ipfs.scm (go-ipfs): Update to 0.13.0.
[inputs]: Add GO-GOLANG-ORG-X-{EXP,TEXT}.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Artyom V. Poptsov</td></tr>