merge: short-circuit the _checkfs loop upon getting ENOENT
This reduces the number of [lstat] calls when updating from rev(-1) to
a rev with lots of files by a factor of several: for path foo/bar/baz/quux.txt
without this patch we're lstatting:
foo
foo/bar
foo/bar/baz
foo/bar/baz/quux.txt
and with this patch:
foo
foo/bar/baz/quux.txt
# See http://EditorConfig.org for the specification
root = true
[*.py]
indent_size = 4
indent_style = space
trim_trailing_whitespace = true
end_of_line = lf
[*.{c,h}]
indent_size = 8
indent_style = tab
trim_trailing_whitespace = true
end_of_line = lf
[*.t]
indent_size = 2
indent_style = space
trim_trailing_whitespace = false
end_of_line = lf