if (expr) 'this is a string' end
is parsed as IF expr STRING END. ''(see [https://
mailman. cae. wisc.edu/ pipermail/octave-maintainers/2014- March/ 039554.html this] post on the mailing list)''
*Clean up functions in input.cc that handle user input (there currently seems to be some unnecessary duplication of code and it seems overly complex).