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/vim9expr.c b/src/vim9expr.c
index 7af8bd6..c2428f4 100644
--- a/src/vim9expr.c
+++ b/src/vim9expr.c
@@ -425,7 +425,7 @@
 
     if (type->tt_type == VAR_OBJECT)
     {
-        ocmember_T *m = object_member_lookup(cl, name, len, &m_idx);
+	ocmember_T *m = object_member_lookup(cl, name, len, &m_idx);
 	if (m_idx >= 0)
 	{
 	    if (*name == '_' && !inside_class(cctx, cl))