debugcommands: add debugpickmergetool to examine which merge tool is chosen
Before this patch, there is no convenient way to know which merge tool
is chosen for each managed files without actual merging.
# 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