remove whitespace

Change-Id: Ie03ffe6e02fe7c4d67a5a6752bc6fa24377da7cd
test case for strict OOXML chart import

Change-Id: Ie000dda7b04615c2e79376c5da5dc96b4ea40db0
add strict OOXML pptx import test

Change-Id: I2e4f17b7b7ab1e14c5cb0f6ce90e771d7c20a5c8