docs: document methods

pkg/saccharine/parser.go

@@ -212,6 +212,7 @@ func parseStatement(i *TokenIterator) (ast.Statement, error) {
 	}
 }
 
+// Given a list of tokens, attempt to parse it into an syntax tree.
 func Parse(tokens []token.Token) (ast.Expression, error) {
 	i := iterator.Of(tokens)