Comparisons broken from residual newline character

[danyill]

I've been finding on a comparison that clicking "Compare" does nothing:

Looking at my browser console:

Then exporting the rule and studying it, I find this:

"Full Compare for Ohangai DTT Diagnosis": {
      "description": "Compare a specific IED (requires user modification)",
      "ourSelector": "\n",
      "theirSelector": "",
      "selectors": {
        "inclusive": false,
        "vals": [
          "DAI[name=\"setSrcRef\"]",
          "LN[lnClass=\"LGOS\"]",
          "LN[lnClass=\"LSVS\"]",
          "Private"
        ],
        "except": []
      },
      "attributes": {
        "inclusive": false,
        "vals": [
          "desc",
          "LN0.lnType",
          "LN.lnType",
          "LNodeType.id",
          "DO.type",
          "SDO.type",
          "DA.type",
          "BDA.type",
          "DAType.id",
          "EnumType.id",
          "FCDA.prefix",
          "RptEnabled.max"
        ],
        "except": []
      },
      "namespaces": {
        "inclusive": false,
        "vals": [],
        "except": []
      }
    }

Note in particular that ourSelector is a newline character. When I remove the newline, import the filter, reload the plugin and try the same rule, it functions correctly. Prior to this I had only modified this rule in the UI so we must somehow not chomp the newline characters.