Fix formatting: remove trailing spaces, #endif with comments (> 10 lines)
diff --git a/include/polarssl/ecdh.h b/include/polarssl/ecdh.h
index 3c4800b..9cd0d4f 100644
--- a/include/polarssl/ecdh.h
+++ b/include/polarssl/ecdh.h
@@ -212,4 +212,4 @@
 }
 #endif
 
-#endif
+#endif /* ecdh.h */