extensions: add a note about debug output during extensions search
These messages do not show up when one use '--debug'. This is quite confusing so
we clarify the situation next to the 'ui.debug' call.
# See http://EditorConfig.org for the specification
root = true
[*.py]
indent_size = 4
indent_style = space
trim_trailing_whitespace = true
[*.{c,h}]
indent_size = 8
indent_style = tab
trim_trailing_whitespace = true