Using (?x) inline regex modifier in DataSplitter doesn't support comments properly

[stroomdev10]

See example Data Splitter below Intended action is to match 10 chars then match 5 chars then ignore rest of the line The first inline comments causes the regex to be truncated

<dataSplitter xmlns="data-splitter:3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="data-splitter:3 file://data-splitter-v3.0.xsd" version="3.0">
  <split delimiter="\n">
    <group>
      <regex pattern="(?x)
^(.{10})
# Stops the regex here - remove this line to fix it
(.{5})
 .+$
# Comment here is fine
 ">
        <data value="$1"></data>
        <data value="$2"></data>
      </regex>
    </group>
  </split>
</dataSplitter>

[stroomdev66]

This issue is due to XML annotations having new lines normalised to a single space as per the XML spec. In order to use an attribute for pattern it would be necessary to add 
 (a new line entity) at the start of each line. Perhaps we should consider using an element for pattern instead of an attribute or use token substitution.

[at055612]

@stroomdev10 can you close and optionally raise an enhancement to support pattern in element text.