fix: smart indentation was counting \t as a character.

The code now counts the amount of characters up to a \t, which we know
is already aligned.

.config/nvim/lua/config/maps.lua

@@ -38,14 +38,20 @@ Map('n', 'gr', vim.lsp.buf.references, { desc = "Go to the reference" })
 -- smart tabulation
 Map('i', '<tab>', function()
 	local _, col = unpack(vim.api.nvim_win_get_cursor(0)) -- get cursor position
-	local isindent = vim.api.nvim_get_current_line():sub(1, col):match('^%s*$')
+	local ln = vim.api.nvim_get_current_line():sub(1, col)
+	local isindent = ln:match('^%s*$')
 	local tabexpnd = vim.bo.expandtab
 	local tabwidth = vim.bo.shiftwidth > 0 and vim.bo.shiftwidth or vim.bo.tabstop
 
 	if not tabexpnd and isindent then
 		return '\t'
-	else
-		local spaces = tabwidth - col % tabwidth
+	else -- Compute the amount of spaces needed for the line.
+		local i = col
+		while i >= 1 do
+			if ln:sub(i, i) == '\t' then break end
+			i = i - 1
+		end
+		local spaces = tabwidth - (col - i) % tabwidth
 		return string.rep(' ', spaces == 0 and tabwidth or spaces)
 	end
 end, { expr = true, desc = "smart tabulation" })