Bring no_implicit_prelude.edition2018 into present

The remainder of this note is in the present tense, so saying that
something "will" happen starting in the 2018 edition makes it sound as
though that will happen in the future, even if what we mean is that
the compiler "will" do it in the 2018 edition and later.  Let's use
the present tense here in emphatic form to distinguish this, and let's
expand "it" for clarity.

Author: traviscross

src/names/preludes.md

@@ -195,7 +195,7 @@ The `no_implicit_prelude` attribute does not affect the [language prelude].
 
 r[names.preludes.no_implicit_prelude.edition2018]
 > [!EDITION-2018]
-> In the 2015 edition, the `no_implicit_prelude` attribute does not affect the [`macro_use` prelude], and all macros exported from the standard library are still included in the `macro_use` prelude. Starting in the 2018 edition, it will remove the `macro_use` prelude.
+> In the 2015 edition, the `no_implicit_prelude` attribute does not affect the [`macro_use` prelude], and all macros exported from the standard library are still included in the `macro_use` prelude. Starting in the 2018 edition, the attribute does remove the `macro_use` prelude.
 
 [`extern crate`]: ../items/extern-crates.md
 [`macro_use` attribute]: ../macros-by-example.md#the-macro_use-attribute