Removed "someone" expression.

[sonson]

Summary

I replaced the sentence pointed out by three reviewers with the current one.

[sonson]

I withdraw this diff.

llvm/docs/tutorial/BuildingAJIT2.rst

 of the ``add`` method.
 
 These two operations, ``add`` and ``emit``, together constitute the layer
 concept: A layer is a way to wrap a part of a compiler pipeline (in this case
 the "opt" phase of an LLVM compiler) whose API is opaque to ORC with an
 interface that ORC can call as needed. The add method takes an
 module in some input program representation (in this case an LLVM IR module)
 and stores it in the target ``JITDylib``, arranging for it to be passed back
-to layer's emit method when someone requests any symbols defined by the module.
+to layer's emit method when any symbol defined by that module is requested. 
 Each layer can complete its own work by calling the ``emit`` method of its base
 layer. For example, in this tutorial our IRTransformLayer calls through to
 our IRCompileLayer to compile the transformed IR, and our IRCompileLayer in
 turn calls our ObjectLayer to link the object file produced by our compiler.
 
 So far we have learned how to optimize and compile our LLVM IR, but we have
 not focused on when compilation happens. Our current REPL optimizes and
 compiles each function as soon as it is referenced by any other code,