Remove trailing whitespace

With `sed -i $(rg -l '[[:blank:]]*$' -g'!thirdparty') -e 's/[[:blank:]]*$//g'`
(+ manual revert of some thirdparty code under `platform/android`).

platform/android/power_android.cpp

@@ -98,7 +98,7 @@ ANativeWindow *Android_JNI_GetNativeWindow(void) {
 	return anw;
 }
 
-/* 
+/*
  *  CODE CHUNK IMPORTED FROM SDL 2.0
  * returns 0 on success or -1 on error (others undefined then)
  * returns truthy or falsy value in plugged, charged and battery