scmutil: remove special handling of pats==("",) in matchandpats() (API)
I don't know under what circumstances we used to pass that value, but
we don't seem to do it now.
Differential Revision: https://phab.mercurial-scm.org/D5921
# 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
[*.t]
indent_size = 2
indent_style = space
trim_trailing_whitespace = false