web: Address review comments

Author: danielhjacobs

web/README.md

@@ -106,7 +106,7 @@ In this project, you may run the following commands to build all packages:
     -   There is `npm run build:dual-wasm` as well, to build a second WebAssembly module that disables all supported WebAssembly extensions,
         potentially resulting in support for more browsers, at the expense of longer build time.
     -   `npm run build:repro` enables reproducible builds. Note that this also requires a `version_seal.json`, which is not provided in the normal Git repository - only specially-marked reproducible source archives. Running this without a version seal will generate one based on the current state of your environment.
-    -   Since we use `RUSTC_BOOTSTRAP` in order to use certain Nightly flags with stable Rust when building dual-wasm, you will also need to run `rustup component add rust-src` with either of the previous two commands.
+    -   You will also need to run `rustup component add rust-src` with either of the previous two commands since we rebuild std for the vanilla WASM module.
 
 From here, you may follow the instructions to [use Ruffle on your website](packages/selfhosted/README.md),
 run a demo locally with `npm run demo`, or [install the extension in your browser](https://github.com/ruffle-rs/ruffle/wiki/Using-Ruffle#browser-extension).

web/packages/core/tools/build_wasm.ts

@@ -155,7 +155,7 @@ function detectWasmOpt() {
         return false;
     }
 }
-const buildWasmMVP = !!process.env["BUILD_WASM_MVP"];
+const buildWasmMvp = !!process.env["BUILD_WASM_MVP"];
 const wasmSource = process.env["WASM_SOURCE"] || "cargo";
 const hasWasmOpt = detectWasmOpt();
 if (!hasWasmOpt) {