tree-wide: make ++/-- usage consistent WRT spacing

Throughout the tree there's spurious use of spaces separating ++ and --
operators from their respective operands.  Make ++ and -- operator
consistent with the majority of existing uses; discard the spaces.

src/core/unit.c

@@ -364,7 +364,7 @@ void unit_add_to_gc_queue(Unit *u) {
         LIST_PREPEND(gc_queue, u->manager->gc_queue, u);
         u->in_gc_queue = true;
 
-        u->manager->n_in_gc_queue ++;
+        u->manager->n_in_gc_queue++;
 }
 
 void unit_add_to_dbus_queue(Unit *u) {
@@ -1864,13 +1864,13 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_su
                 ec = unit_get_exec_context(u);
                 if (ec && exec_context_may_touch_console(ec)) {
                         if (UNIT_IS_INACTIVE_OR_FAILED(ns)) {
-                                m->n_on_console --;
+                                m->n_on_console--;
 
                                 if (m->n_on_console == 0)
                                         /* unset no_console_output flag, since the console is free */
                                         m->no_console_output = false;
                         } else
-                                m->n_on_console ++;
+                                m->n_on_console++;
                 }
         }