That suggests the cells or paragraph margins are too narrow to hold the entire string with the font face & dimensions you're using. You can resolve the problem by any combination of the following:
• widen the cell;
• change the paragraph formatting;
• turn off line-wrapping (which may cause overflowing content to disappear);
• use a different font/size;
• apply the cell 'fit text' option (which will automatically reduce the font width).

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]