message: docs: fix grammar in angular-compiler-options file
  PR Close
diff: @@ -123,7 +123,7 @@ to the generated flat module index instead of the library index file.
  Produces only one `.metadata.json` file, which contains all the metadata necessary
  for symbols exported from the library index. In the generated `.ngfactory.js` files, the flat
  -module index is used to import symbols that includes both the public API from the library index
  +module index is used to import symbols that include both the public API from the library index
  as well as shrowded internal symbols.
  By default the `.ts` file supplied in the `files` field is assumed to be the library index.
  