Parse single instruction in neutral text

ldtext/test.fsx

@@ -0,0 +1,11 @@
+#load ".paket/load/net9.0/main.group.fsx"
+#load "LDText.fs"
+#load "Parser.fs"
+#load "Lexer.fs"
+
+let parse (s:string) =
+    s |> System.Text.Encoding.ASCII.GetBytes |> FSharp.Text.Lexing.LexBuffer<byte>.FromBytes |> Parser.instr(Lexer.read)
+
+parse "abc()"
+parse "abc(def)"
+// parse "abc(def,ghi)"