doc: clarify example in copy-struct description.

* txr.1: The sample copy method given in the description of
copy-struct looks like it could be a special structure function
that would be taken into account by the copy function. It is not.

1 files changed, 6 insertions, 1 deletions

diff --git a/txr.1 b/txr.1
index 992f2743..ef9f7f5e 100644
--- a/txr.1
+++ b/txr.1
@@ -30227,7 +30227,12 @@ method similar to the following:
       my-copy))
 .brev
 
-since this logic is generic, it can be placed in a base
+which can then be invoked on whatever object needs copying.
+(Note that this method is not a special structure function, and is thus
+not taken into account by the
+.code copy
+function.)
+Since this logic is generic, it can be placed in a base
 method. The
 .code copied
 method which it calls is the means by which the new object is notified that it