As of PN 2.1.5/PyPN 0.12 you can insert python scripts into Text Clips greatly expanding their functionality.
You can insert python scripts in between backquotes/backticks (``).
`print "hello world"`
inserts the following text: hello world
All stdout output is captured and inserted into the text clip.
Placing highlighted text into an HTML paragraph tag:
This uses the Variable ''PN_SELECTEDTEXT'' to insert these currently selected text into the current Text Clip, then it uses PyPN's
Scintilla::Clear() function to clear the currently selected text.
Replicate the Current Line:
For this you can set the short cut to something like 'rep' and then at the end of a line type 'rep' and press the autocomplete (ctrl+alt+space by default) and the current line will be repeated.