Invoke the otmot() monitor function once at the start.
Not unlike the "one last try" a few lines above, there might be situations
where the criteria has already been met, but no mutations have been
observered and no time out.
Issue #218.
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JSDoc: Fix typo in comment.
Issue #221.
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Factor roCallback() out of otrot().
This is to be consistent with otmot().
While in here, also added an initial and final calls to the monitoring
function. Previously the final call was explicitly avoided in otrot(), but
upon reflection, seems to cause no harm. Similarly, the initial call was just
added to otmot() and seems reasonable here.
Issue #221.
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Bump version number.
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