If set, the COLUMNS environment variable will take precedence over terminal
width. However, please note that COLUMNS is usually *not* exported by shells to
child processes, so in most cases COLUMNS will be undefined for ledger---hence
the motivation for this change.
Terminal width is queried using ioctl() on stdin. For the sake of portability
the querying is done only on platform where ioctl() is detected as supported at
compile-time.
A wrong query string was generated by "select account": one ansify_if()
too much was listed and justify() was called with the wrong parameters.
Bug fix for #744
It's possible to just say "select account" without a "from", so
put the debug statement at the end of the block where the variable
"formatter" is filled with the query string.
