config.fish: lazy load job control functions

These don't really belong in config.fish.  Put them in function files,
like similar wrappers.  The redundancy is ugly but if it's a problem
we can use code generation to fix that.

share/config.fish

@@ -143,26 +143,6 @@ end
 # PATH is possibly set above.
 __fish_reconstruct_path
 
-for jobbltn in bg wait disown
-    function $jobbltn -V jobbltn
-        set -l args (__fish_expand_pid_args $argv)
-        and builtin $jobbltn $args
-    end
-end
-function fg
-    set -l args (__fish_expand_pid_args $argv)
-    and builtin fg $args[-1]
-end
-
-if command -q kill
-    # Only define this if something to wrap exists
-    # this allows a nice "command not found" error to be triggered.
-    function kill
-        set -l args (__fish_expand_pid_args $argv)
-        and command kill $args
-    end
-end
-
 if status is-interactive
     __fish_migrate
 end

share/functions/bg.fish

@@ -0,0 +1,5 @@
+# localization: tier1
+function bg
+    set -l args (__fish_expand_pid_args $argv)
+    and builtin bg $args
+end

share/functions/disown.fish

@@ -0,0 +1,5 @@
+# localization: tier1
+function wait
+    set -l args (__fish_expand_pid_args $argv)
+    and builtin wait $args
+end

share/functions/fg.fish

@@ -0,0 +1,5 @@
+# localization: tier1
+function fg
+    set -l args (__fish_expand_pid_args $argv)
+    and builtin fg $args[-1]
+end

share/functions/kill.fish

@@ -0,0 +1,9 @@
+# localization: tier1
+if command -q kill
+    # Only define this if something to wrap exists
+    # this allows a nice "command not found" error to be triggered.
+    function kill
+        set -l args (__fish_expand_pid_args $argv)
+        and command kill $args
+    end
+end

share/functions/wait.fish

@@ -0,0 +1,5 @@
+# localization: tier1
+function wait
+    set -l args (__fish_expand_pid_args $argv)
+    and builtin wait $args
+end

tests/checks/fg.fish

@@ -5,7 +5,7 @@ fg (math 2 ^ 31 - 1)
 
 fg (math 2 ^ 31)
 # CHECKERR: fg: '2147483648' is not a valid process ID
-# CHECKERR: {{.*}}config.fish (line {{\d+}}):
+# CHECKERR: {{.*}}/fg.fish (line {{\d+}}):
 # CHECKERR:     and builtin fg $args[-1]
 # CHECKERR:         ^
 # CHECKERR: in function 'fg' with arguments '2147483648'