I recorded a register and it work normally.
I mistakenly overrode that register, fortunately I already saved the pattern. It's as below:
This means I copy a block (which have
_a_) and paste it to two others block, then change
However, when I copy this line to my new register and execute, it don't understand that it need to replace ^M with Enter. However, it stop at command line with exact whole register content.
I tried change ^M to
<Enter>, but they don't work also.