patch 8.2.1744: Vim9: using ":const!" is weird

Problem:    Vim9: using ":const!" is weird.
Solution:   Use "var" - "final" - "const" like Dart.  "let" still works for
            now.
diff --git a/src/ex_cmdidxs.h b/src/ex_cmdidxs.h
index 53081d0..0f9eb39 100644
--- a/src/ex_cmdidxs.h
+++ b/src/ex_cmdidxs.h
@@ -11,26 +11,26 @@
   /* d */ 108,
   /* e */ 133,
   /* f */ 156,
-  /* g */ 172,
-  /* h */ 178,
-  /* i */ 187,
-  /* j */ 206,
-  /* k */ 208,
-  /* l */ 213,
-  /* m */ 275,
-  /* n */ 293,
-  /* o */ 313,
-  /* p */ 325,
-  /* q */ 364,
-  /* r */ 367,
-  /* s */ 387,
-  /* t */ 456,
-  /* u */ 501,
-  /* v */ 512,
-  /* w */ 531,
-  /* x */ 545,
-  /* y */ 555,
-  /* z */ 556
+  /* g */ 173,
+  /* h */ 179,
+  /* i */ 188,
+  /* j */ 207,
+  /* k */ 209,
+  /* l */ 214,
+  /* m */ 276,
+  /* n */ 294,
+  /* o */ 314,
+  /* p */ 326,
+  /* q */ 365,
+  /* r */ 368,
+  /* s */ 388,
+  /* t */ 457,
+  /* u */ 502,
+  /* v */ 513,
+  /* w */ 533,
+  /* x */ 547,
+  /* y */ 557,
+  /* z */ 558
 };
 
 /*
@@ -46,7 +46,7 @@
   /* c */ {  3, 12, 16, 18, 20, 22, 25,  0,  0,  0,  0, 33, 37, 40, 46, 56, 58, 59, 60,  0, 62,  0, 65,  0,  0,  0 },
   /* d */ {  0,  0,  0,  0,  0,  0,  0,  0,  8, 18,  0, 19,  0,  0, 20,  0,  0, 22, 23,  0,  0,  0,  0,  0,  0,  0 },
   /* e */ {  1,  0,  2,  0,  0,  0,  0,  0,  0,  0,  0,  7,  9, 10,  0,  0,  0,  0,  0,  0,  0, 17,  0, 18,  0,  0 },
-  /* f */ {  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  9,  0,  0,  0,  0,  0, 15,  0,  0,  0,  0,  0 },
+  /* f */ {  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 10,  0,  0,  0,  0,  0, 16,  0,  0,  0,  0,  0 },
   /* g */ {  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  1,  0,  0,  2,  0,  0,  4,  5,  0,  0,  0,  0 },
   /* h */ {  5,  0,  0,  0,  0,  0,  0,  0,  6,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0 },
   /* i */ {  1,  0,  0,  0,  0,  3,  0,  0,  0,  4,  0,  5,  6,  0,  0,  0,  0,  0, 14,  0, 16,  0,  0,  0,  0,  0 },
@@ -62,11 +62,11 @@
   /* s */ {  2,  6, 15,  0, 19, 23,  0, 25, 26,  0,  0, 29, 31, 35, 39, 41,  0, 50,  0, 51,  0, 63, 64,  0, 65,  0 },
   /* t */ {  2,  0, 19,  0, 24, 26,  0, 27,  0, 28,  0, 29, 33, 36, 38, 39,  0, 40, 42,  0, 43,  0,  0,  0,  0,  0 },
   /* u */ {  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 10,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0 },
-  /* v */ {  0,  0,  0,  0,  1,  0,  0,  0,  4,  0,  0,  0, 10, 13,  0,  0,  0,  0, 16,  0, 17,  0,  0,  0,  0,  0 },
+  /* v */ {  1,  0,  0,  0,  2,  0,  0,  0,  5,  0,  0,  0, 11, 14,  0,  0,  0,  0, 17,  0, 18,  0,  0,  0,  0,  0 },
   /* w */ {  2,  0,  0,  0,  0,  0,  0,  3,  4,  0,  0,  0,  0,  8,  0,  9, 10,  0,  0,  0, 12, 13,  0,  0,  0,  0 },
   /* x */ {  1,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  2,  5,  0,  0,  0,  7,  0,  0,  8,  0,  0,  0,  0,  0 },
   /* y */ {  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0 },
   /* z */ {  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0 }
 };
 
-static const int command_count = 569;
+static const int command_count = 571;