changed:
-
Topmost text here

  don't indent the topmost.. bad things happen if topmost is indented?

This will be a header

 And this is it's para content. And this and 
this and
this

 And This..

  is a sub-section. don't forget to indent the following (1st line) more than the indent of the sub-head
 I suppose, but
what about this outdent?

  Even more, I suppose

   under here...
hey!

 Else (line below isn't more deeply indented than this one)

 It won't be a sub head

  How far

   can we go?
ummm

    what? more?
   
     tryit
hello

Hello here (dbl-underlined)
===========================
So underlining is just regular text in *structured*, it only makes a heading in *re-structured* markup. So don'e us it!

more stuff (below is indented, after blankline) 

 *asterisks* _underscores_ **dbl-asterisks** 'sgl-quotes'

and more
 immediately following line indented, then who knows what happens on the long lines? 
This was manually forced on a newline, but 
line should get reflowed, eh?
so this is a deliberately long line to confirm line-reflowing as clained above. It should just go on, and on, forever, but I will probably get tired eventually, and just have to take that as a first approximstion to ''very long''

so here's one

 with one blank, then and indented group,
here's the 2nd line in the group
and here's the 3rd

stuff (indented)after dbl-colon::

 ok here it is (gotta be indented 1st line)
whatitdo?
   here, too
  don't forget to interpose one blank line, too, *eh*