Add docs for "sort" and "diggingInvaders" plugins

I don't know how these were missed, but I've now checked everything
listed by "plug" but not (previously) a heading in Plugins.rst

docs/Core.rst

@@ -237,7 +237,7 @@ The following commands are *not* built-in, but offer similarly useful functions.
 * `multicmd`
 * `nopause`
 * `quicksave`
-* `rb_eval`
+* `rb`
 * `repeat`
 
 
@@ -350,7 +350,7 @@ This section is for odd but important notes that don't fit anywhere else.
   double quotes.  To include a double quote character, use ``\"``.
 
 * If the first non-whitespace character is ``:``, the command is parsed in
-  an alternative mode which is very useful for the `lua` and `rb_eval` commands.
+  an alternative mode which is very useful for the `lua` and `rb` commands.
   The following two command lines are exactly equivalent::
 
     :foo a b "c d" e f

docs/Plugins.rst

@@ -370,7 +370,7 @@ Usage: ``command-prompt [entry]``
 If called with an entry, it starts with that text filled in.
 Most useful for developers, who can set a keybinding to open
 a laungage interpreter for lua or Ruby by starting with the
-`:lua <lua>` or `:rb_eval <rb_eval>` commands.
+`:lua <lua>` or `:rb <rb>` commands.
 
 Otherwise somewhat similar to `gui/quickcmd`.
 
@@ -390,12 +390,12 @@ Type ``hotkeys`` into the DFHack console to open the screen,
 or bind the command to a globally active hotkey.  The default
 keybinding is :kbd:`Ctrl`:kbd:`F1`.  See also `hotkey-notes`.
 
-.. _rb_eval:
+.. _rb:
 
-rb_eval
+rb
-=======
+==
-Evaluate the following arguments as a ruby string.  Best used as
+Ruby language plugin, which evaluates the following arguments as a ruby string.
-``:rb_eval [string]``, for the special parsing mode.
+Best used as ``:rb [string]``, for the special parsing mode.  Alias ``rb_eval``.
 
 .. _manipulator:
 
@@ -627,6 +627,42 @@ twaterlvl
 =========
 Toggle between displaying/not displaying liquid depth as numbers.
 
+.. _sort-items:
+
+sort-items
+==========
+Sort the visible item list::
+
+    sort-items order [order...]
+
+Sort the item list using the given sequence of comparisons.
+The ``<`` prefix for an order makes undefined values sort first.
+The ``>`` prefix reverses the sort order for defined values.
+
+Item order examples::
+
+    description material wear type quality
+
+The orderings are defined in ``hack/lua/plugins/sort/*.lua``
+
+.. _sort-units:
+
+sort-units
+==========
+Sort the visible unit list::
+
+    sort-units order [order...]
+
+Sort the unit list using the given sequence of comparisons.
+The ``<`` prefix for an order makes undefined values sort first.
+The ``>`` prefix reverses the sort order for defined values.
+
+Unit order examples::
+
+    name age arrival squad squad_position profession
+
+The orderings are defined in ``hack/lua/plugins/sort/*.lua``
+
 .. _stocks:
 
 stocks
@@ -2099,6 +2135,15 @@ or 'snow', with those words as commands (eg ``weather rain``).
 Mods and Cheating
 =================
 
+.. _add-spatter:
+
+add-spatter
+===========
+This plugin makes reactions with names starting with ``SPATTER_ADD_``
+produce contaminants on the items instead of improvements.  The plugin is
+intended to give some use to all those poisons that can be bought from caravans,
+so they're immune to being washed away by water or destroyed by `clean`.
+
 .. _adv-bodyswap:
 
 adv-bodyswap
@@ -2153,6 +2198,38 @@ Options:
 :building:  Subsequent items will become part of the currently selected building.
             Good for loading traps; do not use with workshops (or deconstruct to use the item).
 
+.. _diggingInvaders:
+
+diggingInvaders
+===============
+Makes invaders dig or destroy constructions to get to your dwarves.
+
+To enable/disable the pluging, use: ``diggingInvaders (1|enable)|(0|disable)``
+
+Basic usage:
+
+:add GOBLIN:        registers the race GOBLIN as a digging invader. Case-sensitive.
+:remove GOBLIN:     unregisters the race GOBLIN as a digging invader. Case-sensitive.
+:now:               makes invaders try to dig now, if plugin is enabled
+:clear:             clears all digging invader races
+:edgesPerTick n:    makes the pathfinding algorithm work on at most n edges per tick.
+                    Set to 0 or lower to make it unlimited.
+
+You can also use ``diggingInvaders setCost (race) (action) n`` to set the
+pathing cost of particular action, or ``setDelay`` to set how long it takes.
+Costs and delays are per-tile, and the table shows default values.
+
+============================== ======= ====== =================================
+Action                         Cost    Delay  Notes
+============================== ======= ====== =================================
+``walk``                       1       0      base cost in the path algorithm
+``destroyBuilding``            2       1,000  delay adds to the job_completion_timer of destroy building jobs that are assigned to invaders
+``dig``                        10,000  1,000  digging soil or natural stone
+``destroyRoughConstruction``   1,000   1,000  constructions made from boulders
+``destroySmoothConstruction``  100     100    constructions made from blocks or bars
+============================== ======= ====== =================================
+
+
 .. _fastdwarf:
 
 fastdwarf
@@ -2347,15 +2424,3 @@ can easily result in inconsistent state once this plugin is
 available again. The effects may be as weird as negative power
 being generated.
 
-.. _add-spatter:
-
-add-spatter
-===========
-This plugin makes reactions with names starting with ``SPATTER_ADD_``
-produce contaminants on the items instead of improvements. The produced
-contaminants are immune to being washed away by water or destroyed by `clean`.
-
-The plugin is intended to give some use to all those poisons that can
-be bought from caravans.  It's most useful when combined with
-`tweak` ``fix-dimensions`` and ``advmode-contained`` to patch :bug:`808`.
-