use path.join

Author: Kelly Selden

test/unit/get-start-and-end-commands-test.js

@@ -24,7 +24,7 @@ const packageName = 'ember-cli';
 const commandName = 'ember';
 const blueprint = 'test-blueprint';
 const blueprintPath = '/path/to/blueprint';
-const projectRoot = path.normalize(`${cwd}/${projectName}`);
+const projectRoot = path.join(cwd, projectName);
 const baseBlueprint = loadDefaultBlueprint([], baseVersion);
 const defaultStartBlueprint = loadDefaultBlueprint([], startVersion);
 const defaultEndBlueprint = loadDefaultBlueprint([], endVersion);