shortuser should stop before the first space character. Examples: "Foo Bar <foo.bar AT example DOT com>" -> "foo.bar" (instead of "foo.bar AT example DOT com>" as it was before.) "Foo Bar" -> "Foo"

abort: Failed to parse .../t/.hg/hgrc
File contains no section headers.
file: .../t/.hg/hgrc, line: 1
'invalid\n'