🐐 Various fixes

README.md

@@ -67,13 +67,13 @@ Strings are written as text in quotes (`'` or `"`).
 DESIGNA x VT "this is a string"
 ```
 
-Strings are concatenated with `:`:
+Strings are concatenated with `&`:
 
 ```
-DESIGNA greeting VT "Hello, " : "world!"
+DESIGNA greeting VT "Hello, " & "world!"
 ```
 
-`NVLLVS` coerces to an empty string when used with `:`. Note: `+` is for arithmetic only — using it on strings raises an error.
+`NVLLVS` coerces to an empty string when used with `&`. Note: `+` is for arithmetic only — using it on strings raises an error.
 
 ### Integers
 Integers must be written in roman numerals using the following symbols:
@@ -165,12 +165,13 @@ SI x TVNC {
 
 ```
 DESIGNA x VT II
-SI x EST I TVNC
+SI x EST I TVNC {
     DICE(I)
-ALVID SI x EST II TVNC
+} ALVID SI x EST II TVNC {
     DICE(II)
-ALVID
+} ALVID {
     DICE(III)
+}
 
 > II
 ```