develop: compiler clang@unknown created for /usr/bin/clang-format
https://github.com/scalability-llnl/spack/issues/95

# By Gregory L. Lee
# Via Gregory L. Lee
* commit '2c3e7a6f':
  added graphviz dependency and dysect variant to STAT
  added graphviz and dependencies
  use filter_file instead of patch
  added lapack and blas deps, fixed gfortran compiler dependency

pre-alpha flux build and requisite dependencies

Fixed py-pandas package

adding a fallback on failure with git --depth

Added gui and cscope features to Vim package

NOTE: the ncurses package now installs *BOTH* versions, wide and non-wide
character for compatibility with packages that require either one.  It may be
desirable for this to be an option in the future.

add missing gmp dependency to mpfr package

Certain remote protocols don't support the `--depth` option.  Since this can't
be checked by URL type or in any sane way locally, this version attempts to
clone git repositories with the --depth option, and if that fails attempts the
clone again without it.

- {} is not compatible with Python 2.6