in reply to How can I remove 0 from first line and empty space from the start of the following line and join them
perl -i.bak -n0e 's/0\s+(.*)\n\s+(.*)/$1 $2/g&&print' file
This, a combination of BrowserUk's correct method and Enlil's short method, should do what you want in one line.
-sauoq "My two cents aren't worth a dime.";
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