Apply coding style

Regards https://github.com/profanity-im/profanity/issues/1396

tests/unittests/xmpp/stub_avatar.c

@@ -1,7 +1,10 @@
-#include <stdio.h>
 #include <glib.h>
+#include <stdio.h>
 #include <stdlib.h>
 
-void avatar_pep_subscribe(void) {};
-gboolean avatar_get_by_nick(const char* nick) {return TRUE;}
-
+void avatar_pep_subscribe(void){};
+gboolean
+avatar_get_by_nick(const char* nick)
+{
+    return TRUE;
+}