nit

Author: steveklabnik

src/doc/trpl/rust-inside-other-languages.md

@@ -200,7 +200,8 @@ build  deps  examples  libembed.so  native
 ```
 
 That `libembed.so` is our ‘shared object’ library. We can use this file
-just like any shared object library written in C!
+just like any shared object library written in C! As an aside, this may be
+`libembed.dll` or `libembed.dylib`, depending on the platform.
 
 Now that we’ve got our Rust library built, let’s use it from our Ruby.