syntax: Minify inserting backslashes between `)` and `=`

[LucasLarson]

shfmt --minify is inserting a backslash \ and a newline if there’s an assignment following a closing parenthesis ). For example:

$ cat example.sh
  #!/bin/sh
  case $1 in
  option)
  assignment=not_ok
  echo "${assignment}"
  ;;
  *)
  echo ok
  esac

but then

$ cat example.sh | shfmt -mn
  #!/bin/sh
  case $1 in
  option)\ 
  assignment=not_ok
  echo "$assignment"
  ;;
  *)echo ok
  esac

but what I expected, and what would still work in zsh, bash, ksh, mksh, oksh, posh, yash, and dash, at least on my Mac using Homebrew installations – and still pass shellcheck – is:

$ cat example.sh | shfmt -mn
  #!/bin/sh
  case $1 in
  option)assignment=not_ok
  echo "$assignment"
  ;;
  *)echo ok
  esac

[mvdan]

Thanks, this looks like a minor bug. If there's a way for the minify option to use fewer bytes and still result in valid shell, then it should probably be doing that. Happy to review a patch if someone is up for it.