stray line breaks in pipeline_basics tutorial code examples

Some of the preformatted code examples in pipeline/trunk/src/site/xdoc/pipeline_basics.xml render with unintended linebreaks. that include bold face words use "<b>text</b>" but render with a line break after the "</b>" tag. Rewriting the document with '<span style="font-weight:bold;">text</span>'

A corrective patch is attached.