make build.sh less verbose when test fails

build.sh

@@ -5,7 +5,7 @@ echo -n "building..."
 CFLAGS="$2 $CFLAGS $4" EXTRALIBS="$5" make -j4 -f $3 test tv_gen 1>gcc_1.txt 2>gcc_2.txt || (echo "build $1 failed see gcc_2.txt for more information" && cat gcc_2.txt && exit 1)
 echo -n "testing..."
 if [ -a test ] && [ -f test ] && [ -x test ]; then
-   ((./test >test_std.txt 2>test_err.txt && ./tv_gen > tv.txt) && echo "$1 test passed." && echo "y" > testok.txt) || (echo "$1 test failed" && cat test_err.txt && exit 1)
+   ((./test >test_std.txt 2>test_err.txt && ./tv_gen > tv.txt) && echo "$1 test passed." && echo "y" > testok.txt) || (echo "$1 test failed, look at test_err.txt" && exit 1)
    if find *_tv.txt -type f 1>/dev/null 2>/dev/null ; then
       for f in *_tv.txt; do if (diff --ignore-case $f notes/$f) then true; else (echo "tv_gen $f failed" && rm -f testok.txt && exit 1); fi; done
    fi