foo | no width given | a percent width
foo

foo | no width given | a percent width
spans col 1-2 | last cell
first cell | spans col 2-3

fooooo oooooo oooooo oooooo oooooo | bar

This is colspan=2 | Blah Blah Blah Blah Blah Blah
This is colspan=3 blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah

no colspan declared | Blah Blah Blah Blah Blah Blah
This is colspan=2 blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah