patch 8.2.2638: cannot write a message to the terminal from the GUI

Problem:    Cannot write a message to the terminal from the GUI.
Solution:   Add :echoconsole and use it in the test runner. (issue #7975)
diff --git a/src/ex_cmdidxs.h b/src/ex_cmdidxs.h
index 8afc445..70fb71a 100644
--- a/src/ex_cmdidxs.h
+++ b/src/ex_cmdidxs.h
@@ -10,27 +10,27 @@
   /* c */ 43,
   /* d */ 109,
   /* e */ 134,
-  /* f */ 157,
-  /* g */ 174,
-  /* h */ 180,
-  /* i */ 189,
-  /* j */ 208,
-  /* k */ 210,
-  /* l */ 215,
-  /* m */ 277,
-  /* n */ 295,
-  /* o */ 315,
-  /* p */ 327,
-  /* q */ 366,
-  /* r */ 369,
-  /* s */ 389,
-  /* t */ 458,
-  /* u */ 503,
-  /* v */ 514,
-  /* w */ 535,
-  /* x */ 549,
-  /* y */ 559,
-  /* z */ 560
+  /* f */ 158,
+  /* g */ 175,
+  /* h */ 181,
+  /* i */ 190,
+  /* j */ 209,
+  /* k */ 211,
+  /* l */ 216,
+  /* m */ 278,
+  /* n */ 296,
+  /* o */ 316,
+  /* p */ 328,
+  /* q */ 367,
+  /* r */ 370,
+  /* s */ 390,
+  /* t */ 459,
+  /* u */ 504,
+  /* v */ 515,
+  /* w */ 536,
+  /* x */ 550,
+  /* y */ 560,
+  /* z */ 561
 };
 
 /*
@@ -45,7 +45,7 @@
   /* b */ {  2,  0,  0,  5,  6,  8,  0,  0,  0,  0,  0,  9, 10, 11, 12, 13,  0, 14,  0,  0,  0,  0, 23,  0,  0,  0 },
   /* 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 },
+  /* e */ {  1,  0,  2,  0,  0,  0,  0,  0,  0,  0,  0,  8, 10, 11,  0,  0,  0,  0,  0,  0,  0, 18,  0, 19,  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 },
@@ -69,4 +69,4 @@
   /* 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 = 575;
+static const int command_count = 576;