Fix header trailing whitespace issue with xml export

[segeeslice]

Problem

When running the excel builder, an error would appear within XML Stringify, stating there was an improper header name.

Source

Upon investigation, the element names in question that caused the issue were 'fileVersion ' and 'workbookView '.

Looking at the regex in the XML package, these should not have the spaces in it to work as intended. I presume the XML package has updated at some point to not allow for these spaces.

Solution

Changed these headers to not include the trailing space.

[segeeslice]

Admittedly, I have not researched much on the coding practices of this package. I would be glad to add the changes anywhere else as necessary.

[robert1233]

Would like a merge on this if possible @chuanyi . Removing those two spaces fixes it right up.

[pietersv]

@robert1233 Can you see if this works on branch https://github.com/protobi/msexcelbuilder and if not file a similar PR?

[robert1233]

That works as far as the above issue is concerned! @pietersv