sed join lines together

Question

what would be the sed (or other tool) command to join lines together in a file that do not end w/ the character \'0\'?

I\'ll have lines like this

Answer 1

The rating of this answer is surprising ;s (this surprised wink emoticon pun on sed substitution is intentional) given the OP specifications: sed join lines together.

This submission's last comment

"if that's the case check what @ninjalj submitted"

also suggests checking the same answer.

ie. Check using sed ':a;/0$/{N;s/\n//;ba}' verbatim

sed ':a;/0$/{N;s/\n//;ba}'
 does
 no one
 ie. 0
 people,
 try
 nothing,

 ie. 0
 things,
 any more,
 ie. 0
 tests?

          (^D aka eot 004 ctrl-D ␄  ... bash generate via: echo ^V^D)

which will not give (do the test ;):

 does no one ie. 0
 people, try nothing, ie. 0
 things, any more, ie. 0
 tests?          (^D aka eot 004 ctrl-D ␄  ... bash generate via: echo ^V^D)

To get this use:

sed 'H;${z;x;s/\n//g;p;};/0$/!d;z;x;s/\n//g;'

or:

sed ':a;/0$/!{N;s/\n//;ba}'

not:

sed ':a;/0$/{N;s/\n//;ba}'

---

Notes:

sed 'H;${x;s/\n//g;p;};/0$/!d;z;x;s/\n//g;'

does not use branching and
is identical to:

sed '${H;z;x;s/\n//g;p;};/0$/!{H;d;};/0$/{H;z;x;s/\n//g;}'

• H commences all sequences
• d short circuits further script command execution on the current line and starts the next cycle so address selectors following /0$/! can only be /0$/!! so the address selector of
  /0$/{H;z;x;s/\n//g;} is redundant and not needed.
• if a line does not end with 0 save it in hold space
  /0$/!{H;d;}
• if a line does end with 0 save it too and then print flush (double entendre ie. purged and lines aligned)
  /0$/{H;z;x;s/\n//g;}
• NB ${H;z;x;s/\n//g;p;} uses /0$/ ... commands with an extra p to coerce the final print and with a now unnecessary z (to empty and reset pattern space like s/.*//)