Fix port number in environment variable

calparrot/__main__.py

@@ -36,7 +36,7 @@ async def amain():
     else:
         oauth_info = None
     log.info("Upstream is %s (with%s Oauth)", base_url,
-             '' if calcat_cfg['use-oauth2'] else 'out')
+             '' if oauth_info else 'out')
 
     app = ProxyApp(base_url, oauth_info, args.db)
     log.info("CalParrot will serve constant queries on http://127.0.0.1:%d", app.port)
@@ -44,7 +44,7 @@ async def amain():
     try:
         env = os.environ.copy()
         # Tell the child process (running the notebook) to talk to our proxy:
-        env['CAL_CAL_TOOLS_CALCAT'] = "{base-api-url='http://127.0.0.1:{app.port}/api', use-oauth2=false}"
+        env['CAL_CAL_TOOLS_CALCAT'] = "{base-api-url='http://127.0.0.1:%d/api', use-oauth2=false}" % app.port
         proc = await asyncio.create_subprocess_exec(*args.command, env=env)
         retcode = await proc.wait()
     finally: