tests/test-gendoc-sv.t

templates: make {indent("", "  ")} be empty

indent() is documented to indent all non-empty lines, but it made an
exception for the first line, which always got indented. I also made
indent() not indent the first line even if an indent override was
given for the first line. I think that is what one would usually want.

Differential Revision: https://phab.mercurial-scm.org/D7432

#require docutils gettext

  $ $TESTDIR/check-gendoc sv
  checking for parse errors