Python 3.7.4

When parsing a file using xml.dom.pulldom.parse(), if the parser is in the middle of text data when default_bufsize is reached it will split the text into multiple DOM Text nodes.

This breaks code expecting that reads the text data using node.firstChild.data.

Note that the parser handles it correctly if the buffer boundary lies in the middle of a tag name; only if it lies in the middle of text data does it result in this behavior.

I believe this is working as intended, but is potentially surprising behavior. If so, perhaps a note could be added to the xml.dom documentation mentioning that this needs to be accounted for.

Per https://stackoverflow.com/a/317494 a correct way to read the text is

''.join(t.nodeValue for t in node.childNodes if t.nodeType == t.TEXT_NODE)

I don't see anything inherently wrong with having multiple text nodes.

In fact, input with very large text content can be considered a security threat (c.f. compression bombs), so a tool like pulldom (which is designed for incremental processing) should not start collecting more content than the user asked for. Getting multiple text nodes in some cases seems an ok-ish price to pay.

A documentation PR is welcome.