fileset: use fctx.isbinary instead of util.binary(fctx.data())
filectx provides "isbinary" to test if the data is binary. Let's use it.
This enables other filectx implementations (like LFS) to override the
isbinary test.
# 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