txtMergeLines: A merges lines while preserving the line break for html/LaTeX
Description
This function helps you to do a multiline table header in
both html and in LaTeX. In html this isn't that tricky, you
just use the command but in LaTeX I often find
myself writing vbox/hbox stuff and therefore I've created
this simple helper function
Usage
txtMergeLines(..., html = 5)
Arguments
...
The lines that you want to be joined
html
If HTML compatible output should be used. If
FALSE it outputs LaTeX formatting. Note if you set
this to 5 then the html5 version of br will be
used: otherwise it uses the
that is comp