Generate XML file with xmltree [nesting format issue]

[matthesoundman]

Hello, I am very new to Nim and recently discovered it. I thought it might be 
cool to generate an XML file for my app cast updater. I seem to misunderstand 
or there is bug when I am trying to nest with indentation.

Format exmple: 
    
    
    # <xml header>
    # <rss>
    #   <channel>
    #     <title>
    #     <description>
    #     <item>
    #       <title><title/>
    #       <sparkle><sparkle/>
    #       <pub date><pub date/>
    #       <enclosure/>
    #     </item>
    #  </channel>
    # </rss>
    
    
    Run

Code example: 
    
    
    # item tree 
########################################################################################
    var t = newElement("title")
    t.add newText("Version")
    
    var sr = newElement("sparkle:releaseNotesLink")
    sr.add newText("some url to the release notes")
    
    var pd = newElement("pubDate")
    pd.add newText("the date")
    
    var enc = newElement("enclosure")
    let repo = "https://my-repo/";
    let sV = "1.0"
    let eAttr = {"url": repo, "sparkle:version": sV}.toXmlAttributes
    enc.attrs = eAttr
    
    let itemTree = newXmlTree("item", [t, sr, pd, enc])
    
    # channel tree 
#####################################################################################
    var title = newElement("title")
    title.add newText("My App Title")
    
    var description = newElement("description")
    description.add newText("For GUI updates")
    
    let channelTree = newXmlTree("channel", [title, description, itemTree])
    
    # rss tree 
#########################################################################################
    let namespace = "http://www.andymatuschak.org/xml-namespaces/sparkle";
    let elements = "http://purl.org/dc/elements/1.1/";
    let v = "2.0"
    let nsAtt = {"xmlns:sparkle": namespace, "xmlns:dc": elements, "version": 
v}.toXmlAttributes
    
    let rssTree = newXmlTree("rss", [channelTree], nsAtt)
    
    # output to file 
###################################################################################
    echo rssTree
    let f = open("test.xml", fmWrite)
    try:
      write(f, xmlHeader & $rssTree)
    finally:
      f.close()
    
    
    Run

Output: 
    
    
    <rss version="2.0" 
xmlns:sparkle="http://www.andymatuschak.org/xml-namespaces/sparkle"; 
xmlns:dc="http://purl.org/dc/elements/1.1/";><channel>
        <title>My App Title</title>
        <description>For GUI updates</description>
        <item>
          <title>Version</title>
          <sparkle:releaseNotesLink>some url to the release 
notes</sparkle:releaseNotesLink>
          <pubDate>the date</pubDate>
          <enclosure sparkle:version="1.0" url="https://my-repo/"; />
        </item>
      </channel></rss>
    
    
    Run

I am expecting the 
    
    
    <channel>
    
    Run

element to be on its own line indented. I am also expecting the end 
    
    
    </rss>
    
    Run

to be on its own line as well.

I am not sure where I am going wrong. If anyone has any tips it would be 
greatly appreciated. Thank you kindly!