Fix warnings for icon font without space inside PDF/A, add tests #304
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Googles MaterialIcons-Font does not contain a space character. When using PDF/A, the layout algorithm tries to eagerly find out the width of the space character. This does not happen when PDF/A is not used.
I changed the algorithm to only query for the width if there is actually a space inside the element.
Added tests to verify the fix (the PDF/A one failed previously).