Chore: trim spaces

kernel/lib/exception.c

@@ -35,6 +35,6 @@ void synchronous_handler()
 
   uint64_t esr_el1 = 0x0;
   R_SYSREG(esr_el1, esr_el1);
-  
+
   LOG(x0); LOG(spsr_el1); LOG(elr_el1); DEBUG_EXCEP(esr_el1);
 }

kernel/lib/mman.c

@@ -154,7 +154,7 @@ uint64_t _allocate_page(size_t req, int idx, uint64_t l, uint64_t r)
     ret = _allocate_page(req, LIDX, l, m);
   if (ret == MMAN_NO_PAGE && RCH->size >= req)
     ret = _allocate_page(req, RIDX, m, r);
-  
+
   _pull(idx, sz);
   return ret;
 }

kernel/lib/shell.c

@@ -233,7 +233,7 @@ int shell(file_node_t *initrd_root)
     char *p1 = VEC_AT(char, args, 1);
     _memalloc((size_t)atoi32(p1));
   } else if (!strcmp(cmd, "free") && args->size >= 2) {
-    char *p1 = VEC_AT(char, args, 1); 
+    char *p1 = VEC_AT(char, args, 1);
     _free((uint64_t)atoh32(p1));
   } else if (!strcmp(cmd, "ls")) {
     _ls(initrd_root);