awful.util: rename table.concat to table.join

This is to avoid confusion with Lua's table.concat which takes a table
and returns a string of all its elements concatenated with a given
separator.

Signed-off-by: koniu <gkusnierz@gmail.com>
Signed-off-by: Julien Danjou <julien@danjou.info>

lib/awful/button.lua.in

@@ -31,7 +31,7 @@ local function new(_, mod, ...)
     local ret = {}
     local subsets = util.subsets(ignore_modifiers)
     for _, set in ipairs(subsets) do
-        ret[#ret + 1] = capi.button(util.table.concat(mod, set), unpack(arg))
+        ret[#ret + 1] = capi.button(util.table.join(mod, set), unpack(arg))
     end
     return unpack(ret)
 end

lib/awful/key.lua.in

@@ -31,7 +31,7 @@ local function new(_, mod, ...)
     local ret = {}
     local subsets = util.subsets(ignore_modifiers)
     for _, set in ipairs(subsets) do
-        ret[#ret + 1] = capi.key(util.table.concat(mod, set), unpack(arg))
+        ret[#ret + 1] = capi.key(util.table.join(mod, set), unpack(arg))
     end
     return unpack(ret)
 end

lib/awful/util.lua.in

@@ -217,12 +217,12 @@ function subsets(set)
     return ret
 end
 
---- Concat all tables given as parameters.
+--- Join all tables given as parameters.
 -- This will iterate all tables and insert value from 1 to N.
 -- Non integer keys are ignored.
--- @param args A list of tables to concatenate
--- @return A new table with arguments concatened.
-function table.concat(...)
+-- @param args A list of tables to join
+-- @return A new table containing all interger keys from the arguments.
+function table.join(...)
     local ret = {}
     for i = 1, arg.n do
         for k, v in ipairs(arg[i]) do table.insert(ret, v) end