Code review comment for lp:~spud/spud/copy-paste-fix

I attempted to replicate #811200 with this branch.

I don't get Cian's terminal error; I think that's been fixed, and I suspect it's something to do with running the wrong version of diamond. Cian: when you check out a branch, just do

cd branch
./configure
python diamond/bin/diamond [args]

and it will automatically use the right code.

But I get a different bug. It doesn't give any exception, but when I save the file I get

<?xml version='1.0' encoding='utf-8'?>
<dummy_options>
  <system name="Dummy">
    <nonlinear_solver name="Simple">
      <type name="SNES">
        <python name="Jacobian" rank="1">
          <string_value lines="20" type="python">some python code here</string_value>
        </python>
      </type>
    </nonlinear_solver>
    <nonlinear_solver>
      <type name="SNES">
        <python name="Jacobian" rank="1">
          <string_value type="python" lines="20"/>
        </python>
      </type>
    </nonlinear_solver>
  </system>
</dummy_options>

Note that the second nonlinear solver has a) lost its name, and b) lost its python code. It *looks* fine in the live diamond window, but if you save it it gets lost. (If you open it up again, you'll get all sorts of lost element errors.)