refactor(iferr): change api

lua/gopher/iferr.lua

@@ -1,10 +1,9 @@
----Add iferr declaration
+local c = require("gopher.config").commands
----That's Lua of vimscript implementation of:
----github.com/koron/iferr
-return function()
-  local c = require("gopher.config").config.commands
 local u = require "gopher._utils"
+local iferr = {}
 
+-- That's Lua of vimscript implementation of: github.com/koron/iferr
+iferr.iferr = function()
   local boff = vim.fn.wordcount().cursor_bytes
   local cmd = (c.iferr .. " -pos " .. boff)
   local data = vim.fn.systemlist(cmd, vim.fn.bufnr "%")
@@ -19,3 +18,5 @@ return function()
   vim.cmd [[silent normal! j=2j]]
   vim.fn.setpos(".", pos)
 end
+
+return iferr

lua/gopher/init.lua

@@ -6,7 +6,7 @@ local gopher = {}
 gopher.setup = require("gopher.config").setup
 gopher.install_deps = require "gopher.installer"
 gopher.impl = require "gopher.impl"
-gopher.iferr = require "gopher.iferr"
+gopher.iferr = require("gopher.iferr").iferr
 gopher.comment = require "gopher.comment"
 
 gopher.tags_add = tags.add