fix deleting indentation when there wasn't any

before pressing backspace when there were config.indent_size many spaces
right before the caret would delete them regardless of config.indent_type being
"hard" or not

TODO

@@ -15,6 +15,10 @@
 [x] add menu to exec arbitrary command -> added console
 	[ ] that command can be what is selected
 [ ] console: accept input
+[ ] console: add option to open terminal
+[ ] console: make the itegrated console v100 compatible
+[ ] console: automatically switch focus to the previous rootview when hiding it
+             or selecting something from a treeview
 [ ] doc: detect file changes with hash
 [x] add horizontal scroll
 [ ] add a cross to close tab

data/core/commands/doc.lua

@@ -127,7 +127,7 @@ local commands = {
 
   ["doc:backspace"] = function()
     local line, col = doc():get_selection()
-    if not doc():has_selection() then
+    if not doc():has_selection() and config.tab_type ~= "hard" then
       local text = doc():get_text(line, 1, line, col)
       if #text >= config.indent_size and text:find("^ *$") then
         doc():delete_to(0, -config.indent_size)