Ref: https://github.com/blueyed/vim-colors-solarized/commit/92f2f994
This also defines 'g' (gui) colors, which might not be necessary and
cause unnecessary overhead (at least it caused an error when given an
invalid color (RGB without hash symbol), but was added for completeness.
Vim's `get()` calls the expression for `{default}` always, not only if
the default is going to be used!
This caused `airline#extensions#tabline#get_buffer_name` to not use the
cached value.
Fixes https://github.com/bling/vim-airline/issues/697.
While typically both are set (e.g. with `:help`), I am using the
modifiable setting alone to prevent editing of some files via an
autocommand (`*.css`, if `*.scss` exists).
I can also set `readonly` for this buffer, but that gets reset when
reloading the buffer, which is not the case for `modifiable`.
Daniel Hahler