Minor corrections

howto.md

@@ -10,7 +10,7 @@ void example(void);
 #endif
 ```
 
-Do this for each file. In this example `another-example.c`, `third-example.c`.
+Do this for each file. In this example `another-example.h`, `third-example.h`.
 
 2. Create implementation / definition of that function:
 
@@ -22,6 +22,8 @@ void example(void);
 }
 ```
 
+Do this for each file. In this example `another-example.c`, `third-example.c`.
+
 3. Compile to object file: `clang -c example.c another-example.c third-example.c`. You can also do `clang -c *.c`.
 
 To create archive (static library): `llvm-ar r outputname.a example.c another-example.c third-example.c`