Minor fixups

building.md

@@ -119,7 +119,7 @@ for the current details.
    bitcode, which the Emscripten compiler will then compile to JavaScript/WebAssembly.
    Because some steps in the build process require a working `perl` binary,
    Emscripten's compiler is used together with a supporting JavaScript file to
-   generate JavaScript code that can be run with `node.js` (called `nodeperl_dev.js`).
+   generate JavaScript/WebAssembly code that can be run with `node.js` (called `nodeperl_dev.js`).
 
 8. Run the equivalent of `make install`, which copies all the Perl modules
    etc. into the target directory that will become part of the Emscripten
@@ -130,7 +130,8 @@ for the current details.
 
 9. The Emscripten compiler is used to take the previously compiled `perl.bc`
    and build the final output, `emperl.js` along with the corresponding
-   `.wasm` and `.data` file.
+   `.wasm` and `.data` file. This step also includes the packaging of the
+   virtual filesystem.
 
 `build.pl` provides various command-line options that allow you to control
 parts of the build process. See `build.pl --help` for details.

using.md

@@ -379,9 +379,9 @@ Arguments from Perl to JavaScript function or method calls are mapped as follows
 
 ### Mappings from Perl to JavaScript
 
-Unlike the JavaScript to Perl mappings, values are generally *copied* from
+Unlike the JavaScript to Perl mappings, values are (currently) generally *copied* from
 Perl to JavaScript, instead of being *referenced*.
-The exceptions are Perl `subs`s and `WebPerl::JSObject`s.
+The exceptions are Perl `sub`s and `WebPerl::JSObject`s.
 
 - Perl arrayrefs become JavaScript arrays
 - Perl hashrefs become JavaScript objects
@@ -393,7 +393,8 @@ The exceptions are Perl `subs`s and `WebPerl::JSObject`s.
   (with its `allow_nonref` option enabled). This means that the choice
   for whether to encode a Perl scalar as a JavaScript number or string is
   left up to the module, and is subject to the usual ambiguities when
-  serializing Perl scalars.
+  serializing Perl scalars. See
+  [the `Cpanel::JSON::XS` documentation](https://metacpan.org/pod/Cpanel::JSON::XS).
 - Other references, including objects, are currently not supported.