keybind: allow moving cursor through wrapped lines

lua/core/mappings.lua

@@ -10,6 +10,13 @@ M.general = {
         ["<C-j>"] = { "<C-w>j", "window down" },
         ["<C-k>"] = { "<C-w>k", "window up" },
 
+        -- Allow moving the cursor through wrapped lines with j, k, <Up> and <Down>
+        -- http://www.reddit.com/r/vim/comments/2k4cbr/problem_with_gj_and_gk/
+        -- empty mode is same as using <cmd> :map
+        -- also don't use g[j|k] when in operator pending mode, so it doesn't alter d, y or c behaviour
+        ["j"] = { 'v:count || mode(1)[0:1] == "no" ? "j" : "gj"', opts = { expr = true } },
+        ["k"] = { 'v:count || mode(1)[0:1] == "no" ? "k" : "gk"', opts = { expr = true } },
+
         -- new buffer
         ["<leader>b"] = { "<cmd> enew <CR>", "new buffer" },