test1135: Fix curl_easy_duphandle prototype for code style

Follow-up to dbadaeb which changed the style.

tests/data/test1135

@@ -58,7 +58,7 @@ CURL_EXTERN CURLcode curl_easy_setopt(CURL *curl, CURLoption option, ...);
 CURL_EXTERN CURLcode curl_easy_perform(CURL *curl);
 CURL_EXTERN void curl_easy_cleanup(CURL *curl);
 CURL_EXTERN CURLcode curl_easy_getinfo(CURL *curl, CURLINFO info, ...);
-CURL_EXTERN CURL* curl_easy_duphandle(CURL *curl);
+CURL_EXTERN CURL *curl_easy_duphandle(CURL *curl);
 CURL_EXTERN void curl_easy_reset(CURL *curl);
 CURL_EXTERN CURLcode curl_easy_recv(CURL *curl, void *buffer, size_t buflen,
 CURL_EXTERN CURLcode curl_easy_send(CURL *curl, const void *buffer,