Fixes prettier

packages/pkg-tests/pkg-tests-core/sources/utils/fs.js

@@ -173,3 +173,11 @@ exports.readJson = async function readJson(source: string): Promise<any> {
     throw new Error(`Invalid json file (${source})`);
   }
 };
+
+exports.makeFakeBinary = async function(
+  target: string,
+  {output = `Fake binary`, exitCode = 1}: {|output: string, exitCode: number|} = {},
+): Promise<void> {
+  await exports.writeFile(target, `#!/bin/sh\necho "${output}"\nexit ${exitCode}\n`);
+  await exports.chmod(target, 0o755);
+};

src/util/execute-lifecycle-script.js

@@ -141,11 +141,11 @@ export async function makeEnv(
   // split up the path
   const envPath = env[constants.ENV_PATH_KEY];
   const pathParts = envPath ? envPath.split(path.delimiter) : [];
-  
+
   // Include the directory that contains node so that we can guarantee that the scripts
   // will always run with the exact same Node release than the one use to run Yarn
   pathParts.unshift(path.dirname(process.execPath));
-  
+
   // Include node-gyp version that was bundled with the current Node.js version,
   // if available.
   pathParts.unshift(path.join(path.dirname(process.execPath), 'node_modules', 'npm', 'bin', 'node-gyp-bin'));