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
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