the file generated by test code can't be opened because of an error.

[kematy]

I use Microsoft Office Word 2007 open
test.docx, it popde up a msgbox: The file test.docx cannot be opened because of an error.
Details ：The detailed information Unexpected output ends.Location: part: /word/document.xml, row: 1, column: 77

[kematy]

test.docx

[kematy]

win7 OS，ruby2.6，and the lasest 0.11.2 gem.