docs: update nature doc to have new correct info

docs/nature.txt

@@ -1,8 +1,7 @@
 A bit after creation, we have the outside nature. Little plants, seeds,
 growing to their final phase: a full plant. A lot of Hilbish itself is
-written in Go, but there are parts made in Lua, being the `doc` command,
-command not executable/found hooks to print a message in the shell,
-and other things.
+written in Go, but there are parts made in Lua, being most builtins
+(`doc`, `cd`, cdr), completions, and other things.
 
 Hilbish's Lua core module is called `nature`. It's handled after everything
 on the Go side initializes, which is what that first sentence was from.

nature/commands/doc.lua

@@ -58,6 +58,7 @@ commander.register('doc', function(args)
 			local propstr = ''
 			local modDesc = ''
 			local modmt = getmetatable(require(mod))
+			if modmt then
 				modDesc = modmt.__doc
 				if modmt.__docProp then
 					-- not all modules have docs for properties
@@ -70,6 +71,7 @@ commander.register('doc', function(args)
 				end
 				desc = string.format(modDocFormat, modDesc, propstr)
 			end
+		end
 		print(desc .. formattedFuncs)
 		f:close()
 

nature/init.lua

@@ -2,7 +2,7 @@
 local _ = require 'succulent' -- Function additions
 
 package.path = package.path .. ';' .. hilbish.dataDir .. '/?/init.lua'
-.. ';' .. hilbish.dataDir .. '/?/?.lua'
+.. ';' .. hilbish.dataDir .. '/?/?.lua' .. ";" .. hilbish.dataDir .. '/?.lua'
 
 require 'nature.commands'
 require 'nature.completions'