fix: add parens around the null coalescing operator to fix issues when npm_config_user_agent exists (#1519)

Author: dexmlee

bin.js

@@ -15,12 +15,12 @@ if (a == 'init') {
 	w(n, JSON.stringify(o, 0, /\t/.test(s) ? '\t' : 2) + '\n')
 	p.stdout.write(i())
 	try { f.mkdirSync('.husky') } catch {}
-	w('.husky/pre-commit', p.env.npm_config_user_agent?.split('/')[0] ?? 'npm' + ' test\n')
+	w('.husky/pre-commit', (p.env.npm_config_user_agent?.split('/')[0] ?? 'npm') + ' test\n')
 	p.exit()
 }
 
 d = c => console.error(`${c} command is DEPRECATED`)
 if (['add', 'set', 'uninstall'].includes(a)) { d(a); p.exit(1) }
 if (a == 'install') d(a)
 
-p.stdout.write(i(a == 'install' ? undefined : a))
+p.stdout.write(i(a == 'install' ? undefined : a))