dfa tests: Fix test failure on mingw

[Bruno Haible]

On mingw 10, I see this test failure:

FAIL: test-dfa-invalid-char-class.sh
====================================

--- exp 2023-04-20 06:15:56.778614400 +0200
+++ out 2023-04-20 06:15:56.857719400 +0200
@@ -1 +1 @@
-dfaerror: invalid character class
+dfaerror: invalid character class
FAIL test-dfa-invalid-char-class.sh (exit status: 1)

The cause is that the expected output has a Unix LF, whereas the actual
output has a CRLF. This patch fixes the failure.


2023-04-20  Bruno Haible  <bruno@clisp.org>

        dfa tests: Fix test failure on mingw.
        * tests/test-dfa-invalid-char-class.sh: Transform CRLF to LF in the
        output, before comparing with the expected output.

diff --git a/tests/test-dfa-invalid-char-class.sh 
b/tests/test-dfa-invalid-char-class.sh
index 1428d7966a..b9b18980b6 100755
--- a/tests/test-dfa-invalid-char-class.sh
+++ b/tests/test-dfa-invalid-char-class.sh
@@ -24,7 +24,8 @@ path_prepend_ .
 fail=0
 
 echo 'dfaerror: invalid character class' > exp
-LC_ALL=C ${CHECKER} test-dfa-match-aux '[[:foo:]]' a > out 2>&1
+LC_ALL=C ${CHECKER} test-dfa-match-aux '[[:foo:]]' a > tmp 2>&1
+LC_ALL=C tr -d '\r' < tmp > out
 compare exp out || fail=1
 
 Exit $fail