Fix voice in memory_intro.md

Fix passive voice I missed earlier.

Author: Amanda Butler

docs/tutorials/optimize/memory/memory_intro.md

@@ -50,7 +50,7 @@ To disable error logging to serial output, set the `NDEBUG` macro and the follow
 
 You can also take advantage of the fact that these programs only run on embedded targets. When you run a C++ application on a desktop computer, the operating system constructs every global C++ object before calling `main`. It also registers a handle to destroy these objects when the program ends. The code the compiler injects has some implications for the application:
 
-* The code injected by the compiler consumes memory.
+* The code that the compiler injects consumes memory.
 * It implies dynamic memory allocation and thus requires the binary to include `malloc`, even when the application does not use it.
 
 When you run an application on an embedded device, you don't need handlers to destroy objects when the program exits, because the application will never end. You can save more RAM and flash memory usage by [removing destructor registration](https://github.com/ARMmbed/mbed-os/pull/2745) on application startup and by eliminating the code to destruct objects when the operating system calls `exit()` at runtime.