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.
href='/guix/diff/gnu/packages/kde-pim.scm?id=9834d1ab3836730cf3308603019b736d0a653013'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/kde-pim.scm'>
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<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
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<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=9834d1ab3836730cf3308603019b736d0a653013'>root</a>/<a href='/guix/log/gnu?id=9834d1ab3836730cf3308603019b736d0a653013'>gnu</a>/<a href='/guix/log/gnu/packages?id=9834d1ab3836730cf3308603019b736d0a653013'>packages</a>/<a href='/guix/log/gnu/packages/kde-pim.scm?id=9834d1ab3836730cf3308603019b736d0a653013'>kde-pim.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/kde-pim.scm?id=9834d1ab3836730cf3308603019b736d0a653013&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-08-19 16:08:46 +0300'>2020-08-19</span></td><td><a href='/guix/commit/gnu/packages/kde-pim.scm?id=433309d92eae56d441820b429674bb2001b63bc8'>gnu: akonadi: Update home-page.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/kde-pim.scm (akonadi-calendar, akonadi-contacts,
akonadi-mime, akonadi-notes, akonadi-search)[home-page]: Update to
new home-page.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2020-06-06 22:13:25 +0200'>2020-06-06</span></td><td><a href='/guix/commit/gnu/packages/kde-pim.scm?id=6701d2323688d752cdf6e368499dd21f32fb9656'>gnu: KDE: Update to 20.04.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/patches/akonadi-paths.patch: Adjust for upstream changes.
* gnu/packages/patches/kdepim-runtime-Fix-missing-link-libraries.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
* gnu/packages/kde-internet.scm (kget, kopete, krdc, libgravatar): Update to
20.04.1.
[source](uri): Adjust for new upstream location.
* gnu/packages/kde-multimedia.scm (audiocd-kio, dragon, ffmpegthumbs, juk,
k3b, kamoso, kmix, kwave, libkcddb, libkcompactdisc): Likewise.
* gnu/packages/kde-systemtools.scm (dolphin, dolphin-plugins, khelpcenter,
konsole, krfb, ksystemlog): Update to 20.04.1.
[source](uri): Adjust for new upstream location.
* gnu/packages/kde-utils.scm (kate, kmag, kmousetool, kmouth, sweeper): Update
to 20.04.1.
[source](uri): Adjust for new upstream location.
* gnu/packages/kde.scm (baloo-widgets, libkomparediff2, kqtquickcharts,
grantleetheme, kcachegrind, libkdegames, zeroconf-ioslave): Update to 20.04.1.
[source](uri): Adjust for new upstream location.
(grantleetheme)[inputs]: Add KGUIADDONS.
* gnu/packages/kde-pim.scm (akonadi, akonadi-calendar, akonadi-contacts,
akonadi-mime, akonadi-notes, akonadi-search, kincidenceeditor, kaddressbook,
kalarmcal, kblog, kcalendarsupport, kcalutils, kdav, kdepim-apps-libs,
kdepim-runtime, keventviews, kgpg, kidentitymanagement, kimap, kldap,
kleopatra, kmail, kmailcommon, kmailimporter, kmailtransport, kmbox,
kmessagelib, kmime, knotes, kontactinterface, korganizer, kpimcommon,
kpimtextedit, ksmtp, ktnef, libkdepim, libkgapi, libkleo, libksieve): Update
to 20.04.1.
[source](uri): Adjust to current.
(akonadi)[inputs]: Remove KDBUSADDONS and KDESIGNERPLUGIN.
(akonadi-calendar)[inputs]: Remove KDBUSADDONS.
(kdepim-runtime)[source](patches): Remove.
[arguments]: Add phase 'extend-CPLUS_INCLUDE_PATH'.
[inputs]: Remove KDBUSADDONS and KICONTHEMES.
(kmessagelib)[arguments]: Add phase 'extend-CPLUS_INCLUDE_PATH.
[inputs]: Add QCA.
(kdepim-apps-libs)[inputs]: Remove KDBUSADDONS and KICONTHEMES.
(knotes)[inputs]: Remove KDBUSADDONS.
(kpimcommon)[inputs]: Remove KDBUSADDONS and KCOMPLETION.
(libksieve)[arguments]: Disable one more test.
(korganizer)[arguments]: Disable one test.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-06-06 21:14:17 +0200'>2020-06-06</span></td><td><a href='/guix/commit/gnu/packages/kde-pim.scm?id=b69ca4d234db8fe2750e9b0d6b6139a5a89a4da6'>gnu: Add kpeoplevcard.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/kde-pim.scm (kpeoplevcard): New public variable.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-06-06 21:14:17 +0200'>2020-06-06</span></td><td><a href='/guix/commit/gnu/packages/kde-pim.scm?id=6ecdb8dc5ea0dffcf4e42d034368536c368ead04'>gnu: akonadi-search: Enable tests.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/kde-pim.scm (akonadi-search)[native-inputs]: Add DBUS.
[arguments]: Add #:phases.
</span></span></td><td>Marius Bakke</td></tr>