I have a file where I store snippets of vim commands. When I need a snippet, I yank it and then execute it with @". The snippets are stored as a script, one line per command, like this:

:s/foo/bar/g
:echo "hello"
:s/1/2/g

Edit: I removed normal mode commands from the example, as they were not part of the problem.

Now this procedure doesn't work anymore: when executing the snippet, it just stops at the first line as if waiting for a newline.

Is there an option somewhere affecting how @ is executed? I'm pretty sure it was working some time ago...

Substituting the newline with a ^M character works but makes the file more difficult to handle.

Additional information:

Here's another symptom: when I yank a snippet, if I execute it with @" it stops at the first line as I just explained. But if I execute it with :@ it works. But the help file doesn't seem to imply any difference in how the two commands treat the register's content...