ls: Ignore ruby colorls

Apart from OpenBSD's "colorls" that is basically an ls that can do
color, there's also a ruby tool called "colorls" that's closer to exa.

Ignore that one since the options it understands are quite different
and I'm betting it's slower (given my experience with ruby tools).

See #8042.

share/functions/ls.fish

@@ -28,10 +28,20 @@ function ls --description "List contents of directory"
     # Also test -F because we'll want to define this function even with an ls that can't do colors (like NetBSD).
     if not set -q __fish_ls_color_opt
         set -g __fish_ls_color_opt
-        for opt in --color=auto -G --color -F
-            if command ls $opt / >/dev/null 2>/dev/null
-                set -g __fish_ls_color_opt $opt
-                break
+        set -g __fish_ls_command ls
+        # OpenBSD ships a command called "colorls" that takes "-G" and "-F",
+        # but there's also a ruby implementation that doesn't understand "-F".
+        # Since that one's quite different, don't use it.
+        if command -sq colorls
+            and command colorls -GF >/dev/null 2>/dev/null
+            set -g __fish_ls_color_opt -GF
+            set -g __fish_ls_command colorls
+        else
+            for opt in --color=auto -G --color -F
+                if command ls $opt / >/dev/null 2>/dev/null
+                    set -g __fish_ls_color_opt $opt
+                    break
+                end
             end
         end
     end
@@ -42,10 +52,5 @@ function ls --description "List contents of directory"
     isatty stdout
     and set -a opt -F
 
-    if command -sq colorls
-        command colorls -GF $argv
-    else
-        command ls $__fish_ls_color_opt $argv
-    end
-
+    command $__fish_ls_command $__fish_ls_color_opt $argv
 end