Merge pull request rust-lang#2717 from gnzlbg/more_io

try harder to print output

Author: nrc

ci/integration.sh

@@ -21,7 +21,7 @@ cargo install --force
 echo "Integration tests for: ${INTEGRATION}"
 
 function check_fmt {
-    cargo fmt --all -v &> rustfmt_output
+    cargo fmt --all -v 2>&1 | tee rustfmt_output
     if [[ $? != 0 ]]; then
         cat rustfmt_output
         return 1