fix(doc): gears.table.keys: s/integer keys/integer/ (#3293)

lib/awful/util.lua

@@ -385,7 +385,7 @@ function util.linecount(text)
     return gstring.linecount(text)
 end
 
---- Get a sorted table with all integer keys from a table
+--- Get a sorted table with all keys from a table.
 -- @deprecated util.table.keys
 -- @param t the table for which the keys to get
 -- @return A table with keys

lib/gears/table.lua

@@ -149,7 +149,7 @@ function gtable.find_first_key(t, matcher, ordered)
 end
 
 
---- Get a sorted table with all integer keys from a table.
+--- Get a sorted table with all keys from a table.
 --
 -- @tparam table t The table for which the keys to get.
 -- @treturn table A table with keys.

spec/gears/table_spec.lua

@@ -2,6 +2,11 @@
 local gtable = require("gears.table")
 
 describe("gears.table", function()
+    it("table.keys", function()
+        local t = { 1, a = 2, 3 }
+        assert.is.same(gtable.keys(t), { 1, 2, "a" })
+    end)
+
     it("table.keys_filter", function()
         local t = { "a", 1, function() end, false}
         assert.is.same(gtable.keys_filter(t, "number", "function"), { 2, 3 })