Update regex terminals to match new syntax (#1049)

Part of runtimeverification/k/issues/4295

Escapes all usages of `-` and `^` within character classes to align with
the new regex syntax.

Author: Scott-Guest

test/defn/k-files/wasm.k

@@ -1441,10 +1441,10 @@ module WASM-TOKEN-SYNTAX
   syntax WasmStringToken  ::=
     r"\\\"(([^\\\"\\\\])|(\\\\[0-9a-fA-F]{2})|(\\\\t)|(\\\\n)|(\\\\r)|(\\\\\\\")|(\\\\')|(\\\\\\\\)|(\\\\u\\{[0-9a-fA-F]{1,6}\\}))*\\\"" [token]
   syntax IdentifierToken  ::=
-    r"\\$[0-9a-zA-Z!$%&'*+/<>?_`|~=:\\@^.-]+" [token]
+    r"\\$[0-9a-zA-Z!$%&'*+/<>?_`|~=:\\@\\^.\\-]+" [token]
   syntax WasmIntToken  ::=
-    r"[\\+-]?[0-9]+(_[0-9]+)*" [token]
-  | r"[\\+-]?0x[0-9a-fA-F]+(_[0-9a-fA-F]+)*" [token]
+    r"[\\+\\-]?[0-9]+(_[0-9]+)*" [token]
+  | r"[\\+\\-]?0x[0-9a-fA-F]+(_[0-9a-fA-F]+)*" [token]
   syntax #Layout  ::=
     r"\\(;([^;]|(;+([^;\\)])))*;\\)" [token]
   | r";;[^\\n\\r]*" [token]