Fix (wrapatoms uninitialized)

This is a quick fix to avoid regtest failures. The real bug
is the fact that wrapatoms is not read on input in simplemd,
and should be fixed (see #30)
Fixed bug

There was a potential bug when stripping blanks from short strings (1 char)
Fixes #30

I also changed a regtest as a check
Merge branch 'v2.0'