vim-patch:8.2.0593: finding a user command is not optimal (#19386)

Problem:    Finding a user command is not optimal.
Solution:   Start further down in the list of commands.
a494f56f88

src/nvim/ex_cmds.lua

@@ -3298,6 +3298,7 @@ module.cmds = {
     addr_type='ADDR_LINES',
     func='ex_z',
   },
+  -- commands that don't start with a letter
   {
     command='!',
     enum='CMD_bang',
@@ -3347,12 +3348,6 @@ module.cmds = {
     addr_type='ADDR_LINES',
     func='ex_at',
   },
-  {
-    command='Next',
-    flags=bit.bor(EXTRA, RANGE, COUNT, BANG, CMDARG, ARGOPT, TRLBAR),
-    addr_type='ADDR_OTHER',
-    func='ex_previous',
-  },
   {
     command='~',
     enum='CMD_tilde',
@@ -3360,6 +3355,13 @@ module.cmds = {
     addr_type='ADDR_LINES',
     func='ex_substitute',
   },
+  -- commands that start with an uppercase letter
+  {
+    command='Next',
+    flags=bit.bor(EXTRA, RANGE, COUNT, BANG, CMDARG, ARGOPT, TRLBAR),
+    addr_type='ADDR_OTHER',
+    func='ex_previous',
+  },
 }
 
 return module