Fixed typos (#36804)

`to sigmal a function references` => `to signal a function reference`
`Alternative is to...` => `An alternative is to...`

extensions/typescript/syntaxes/Readme.md

@@ -7,10 +7,10 @@ To update to the latest version:
 Migration notes and todos:
 
 - differentiate variable and function declarations from references
-	- I suggest we use a new scope segment 'function-call' to sigmal a function references, and 'definition' to the declaration. Alternative is to use 'support.function' everywhere.
+  - I suggest we use a new scope segment 'function-call' to signal a function reference, and 'definition' to the declaration. An alternative is to use 'support.function' everywhere.
   - I suggest we use a new scope segment 'definition' to the variable declarations. Haven't yet found a scope for references that other grammars use.
 
 - rename scope to return.type to return-type, which is already used in other grammars
 - rename entity.name.class to entity.name.type.class which is used in all other grammars I've seen
 
-- do we really want to have the list of all the 'library' types (Math, Dom...). It adds a lot of size to the grammar, lots of special rules and is not really correct as it depends on the JavaScript runtime which types are present.
\ No newline at end of file
+- do we really want to have the list of all the 'library' types (Math, Dom...). It adds a lot of size to the grammar, lots of special rules and is not really correct as it depends on the JavaScript runtime which types are present.