tests: fix spurious failure due to exported MAKEINFO

* tests/txinfo30.test: Unset variable MAKEINFO, as its content could
take precedence over our faked makeinfo script and cause a spurious
failure.  Reported as part of automake bug#10866.  Add trailing ':'
command since we are at it.

diff --git a/tests/txinfo30.test b/tests/txinfo30.test
index 82ea8565942911ddef9bb9c9dcb820fa84a5941a..09ebd5e183bb855aff8cfe1bf755d58d4904175a 100755 (executable)
--- a/tests/txinfo30.test
+++ b/tests/txinfo30.test
@@ -42,6 +42,10 @@ chmod +x makeinfo
 PATH=`pwd`$PATH_SEPARATOR$PATH
 export PATH
 
+# Otherwise configure might pick up a working makeinfo from the
+# environment.  Seen in automake bug#10866.
+unset MAKEINFO || :
+
 $ACLOCAL
 $AUTOCONF
 $AUTOMAKE --add-missing
@@ -55,3 +59,5 @@ test -f bar.info
 rm -f bar.info
 $MAKE && Exit 1
 test ! -f bar.info
+
+: