patch 8.2.4928: various white space and cosmetic mistakes

Problem:    Various white space and cosmetic mistakes.
Solution:   Change spaces to tabs, improve comments.
diff --git a/src/crypt.c b/src/crypt.c
index 6a852fa..bed76a9 100644
--- a/src/crypt.c
+++ b/src/crypt.c
@@ -452,8 +452,8 @@
     if (cryptmethods[method_nr].init_fn(
 	state, key, salt, salt_len, seed, seed_len) == FAIL)
     {
-        vim_free(state);
-        return NULL;
+	vim_free(state);
+	return NULL;
     }
     return state;
 }
@@ -692,7 +692,7 @@
     cryptstate_T *state,
     char_u	*buf,
     size_t	len,
-    int         last)
+    int		last)
 {
     cryptmethods[state->method_nr].encode_inplace_fn(state, buf, len,
 								    buf, last);