trailing whitespace added at the start of a multi-line if condition

[bradzacher]

Input

if [[
  true ]]; then
  echo 1
fi

Expected

if [[
  true ]]; then
  echo 1
fi

Actual

if [[ 
  true ]]; then
  echo 1
fi

Note the trailing whitespace after the [[

Repro command

$ shfmt --version
3.10.0
$ shfmt --indent 2 --write /tmp/foo.sh

Additional Information

Ignore the fact that true could fit on one line -- the real code is a condition long enough to require line breaks to fit.
It's worth noting that part of me was also surprised that shfmt doesn't emit if [[ true ]] -- but that's separate to the issue of a trailing whitespace.