import statement in XQDoc should not have line number

[Paul J. Lucas]

The example import statement at the top of XQDoc documentation for an XQuery module should not have the single line number of "1" -- it's silly to have a single line numbered. For multi-line code snippets, line numbers are OK (but really should be used only when the surrounding documentation actually references specific line numbers). For a single-line, it's not as obvious that the "1" is a line number since the user can't see any other lines with increasing numbers, e.g., "2", "3", ....