config: don't use 'section "subsection"' internal form on config_set

This had been left over from a time when I believed what the git
documentation had to say about case-sensitivity. The rest of the code
doesn't recognize this form and we hadn't noticed because most tests
don't try to get a recently-set variable but free and reload the
configuration, causing the right format to be used.

0 files changed, 0 insertions, 0 deletions