Simplify evaluateWord type

src/vm.ts

@@ -1,6 +1,15 @@
 import {
-    AsHtml, AsText, BareWord, Concat, HtmlWord, InterpolatedPiece, Script, TextPiece, TextWord, Word
-} from './words';
+  AsHtml,
+  AsText,
+  BareWord,
+  Concat,
+  HtmlWord,
+  InterpolatedPiece,
+  Script,
+  TextPiece,
+  TextWord,
+  Word,
+} from "./words";
 
 /**
  * "Mode" of the environment a script runs in; determines access to mutability features and such.
@@ -31,7 +40,7 @@ export type Vm<Context = {}> = {
 function evaluateWord<Context>(
   state: Vm<Context>,
   word: Word | InterpolatedPiece
-): TextWord | BareWord | HtmlWord {
+): TextPiece {
   if ("bare" in word || "text" in word || "html" in word) {
     return word;
   } else if ("variable" in word) {