delete-blank-lines: chew chunk above too if none below

[Dan Jacobson]

Gentlemen, place your cursor on the smiley




:-), or anywhere on this line, then hit C-x C-o [delete-blank-lines].
Isn't it a let down that it won't delete-blank-lines?

Some will say that that is exactly the correct behavior specified in
the help page.  However Dan says that it is enhancement time.  Indeed,
just 11 months ago, Dan wrote 

Dan> For C-x C-o [delete-blank-lines], I also propose that in addition to
Dan> -----------------------------
Dan> On blank line, delete all surrounding blank lines, leaving just one.
Dan> On isolated blank line, delete that one.
Dan> On nonblank line, delete any immediately following blank lines.
Dan> ------------------------------
Dan> one might add the functionality: If only the previous line is blank,
Dan> but not the current nor next line, then operate on the previous
Dan> line[s] too.

I remember Richard fixed something like this but probably not this,
anyway I don't seem to find it...
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