fix: correct lint issues

tests/unit/builder-dockerfile.bats

@@ -162,4 +162,4 @@ EOF
   echo "status: $status"
   assert_success
   assert_output_contains "SECRET_KEY=fjdkslafjdk"
-}
+}

tests/unit/builder-herokuish.bats

@@ -89,7 +89,6 @@ teardown() {
   assert_failure
 }
 
-
 @test "(builder-herokuish) run" {
   run /bin/bash -c "dokku config:set $TEST_APP SECRET_KEY=fjdkslafjdk"
   echo "output: $output"
@@ -116,4 +115,4 @@ teardown() {
   echo "status: $status"
   assert_success
   assert_output_contains "SECRET_KEY=fjdkslafjdk"
-}
+}

tests/unit/builder-nixpacks.bats

@@ -72,7 +72,6 @@ teardown() {
   assert_output_contains "SECRET_KEY=fjdkslafjdk"
 }
 
-
 inject_requirements_txt() {
   local APP="$1"
   local APP_REPO_DIR="$2"

tests/unit/builder-pack.bats

@@ -153,4 +153,4 @@ teardown() {
   echo "status: $status"
   assert_success
   assert_output_contains "SECRET_KEY=fjdkslafjdk"
-}
+}