fix: wrap all output and status variables in quotes

This will ensure newlines are replaced when these variables are output for debugging tests

tests/unit/10_certs.bats

@@ -29,42 +29,42 @@ teardown() {
 
 @test "(certs) certs:add" {
   run /bin/bash -c "dokku certs:add $TEST_APP $BATS_TMPDIR/tls/server.crt $BATS_TMPDIR/tls/server.key"
-  echo "output: "$output
-  echo "status: "$status
+  echo "output: $output"
+  echo "status: $status"
   assert_success
 }
 
 @test "(certs) certs:add with multiple dots in the filename" {
   run /bin/bash -c "dokku certs:add $TEST_APP $BATS_TMPDIR/tls/domain.com.crt $BATS_TMPDIR/tls/domain.com.key"
-  echo "output: "$output
-  echo "status: "$status
+  echo "output: $output"
+  echo "status: $status"
   assert_success
 }
 
 @test "(certs) certs:add < tar" {
   run /bin/bash -c "dokku certs:add $TEST_APP < $BATS_TEST_DIRNAME/server_ssl.tar"
-  echo "output: "$output
-  echo "status: "$status
+  echo "output: $output"
+  echo "status: $status"
   assert_success
 }
 
 @test "(certs) certs:add < tar should ignore OSX hidden files" {
   run /bin/bash -c "dokku certs:add $TEST_APP < $BATS_TEST_DIRNAME/osx_ssl_tarred.tar"
-  echo "output: "$output
-  echo "status: "$status
+  echo "output: $output"
+  echo "status: $status"
   assert_success
 }
 
 @test "(certs) certs:info" {
   run /bin/bash -c "dokku certs:add $TEST_APP < $BATS_TEST_DIRNAME/server_ssl.tar && dokku certs:info $TEST_APP"
-  echo "output: "$output
-  echo "status: "$status
+  echo "output: $output"
+  echo "status: $status"
   assert_success
 }
 
 @test "(certs) certs:remove" {
   run /bin/bash -c "dokku certs:add $TEST_APP < $BATS_TEST_DIRNAME/server_ssl.tar && dokku certs:remove $TEST_APP"
-  echo "output: "$output
-  echo "status: "$status
+  echo "output: $output"
+  echo "status: $status"
   assert_success
 }