patch 9.1.0581: Various lines are indented inconsistently

Problem:  style: Various lines are indented inconsistently
Solution: Retab these lines and correct some comments.
          (zeertzjq)

closes: #15259

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/eval.c b/src/eval.c
index beb913f..a001bba 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -6195,7 +6195,7 @@
 	r = (char_u *)"object of [unknown]";
     }
     else if (copyID != 0 && obj->obj_copyID == copyID
-            && obj->obj_class->class_obj_member_count != 0)
+	    && obj->obj_class->class_obj_member_count != 0)
     {
 	size_t n = 25 + strlen((char *)obj->obj_class->class_name);
 	r = alloc(n);