Indentation style (was: [PATCH] notmuch-dump.c: Fix output file being closed twice)

[Ralph Seichter]

* David Bremner:

> I did have to revert one unrelated whitespace change.

I knew I might run afoul of that the minute I read "Indent is 4 spaces
with mixed tab/spaces and a tab width of 8" in the code style notes. ;-)

In my experience, it is error-prone to mix tabs and spaces. Perhaps it
would be useful to change to all spaces? Also, with an added editor mode
line, supporting that style would be more convenient (for Emacs and Vim
at least).

-Ralph