Merge branch 'develop' into #3-issue

src/list/copy.c

@@ -169,17 +169,14 @@ size_t list_slice(list_t* x, list_t* s, ssize_t i, size_t n, _Bool cut) {
     } else {
         if (c->prev) {
             c->prev->next = e->next;
-        } else x->first = e->next;
+        } else s->first = e->next;
 
         if (e->next) {
             e->next->prev = c->prev;
         } else s->last = c->prev;
 
-        e->next = nullptr;
-        c->prev = nullptr;
-
-        x->first = c;
-        x->last  = e;
+        (x->first = c)->prev = nullptr;
+        (x->last  = e)->next = nullptr;
     }
 
     return r;

src/list/sort.c

@@ -34,7 +34,7 @@ void list_sort(list_t* x) {
             lnode_t *p = l->prev;
 
             for (lnode_t* c = l; c != r; c = c->next) {
-                if (lnode_compare(c, r) < 0) {
+                if (lnode_compare(c, r) <= 0) {
                     p = (is_null(p)) ? l : p->next;
                     lnode_swap(p, c);
                 }