rhg: use generic DestArr in hash_mangle
This simplifies code a bit more, but comes with an extra memory copy
in case [destlen == dest_vec.len()].
This is probably fine, but a follow-up change is removing that too.
# 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