v0.4.0

Highlights:

• Merge parser, ast, token and printer into a single package syntax
• Use separate operator types in nodes rather than Token
• Use operator value names that express their function
• Keep ; if on a separate line when formatting
• cmd/shfmt
  • Allow whitespace after #! in a shebang
• syntax
  • Implement operator precedence for [[ ]]
  • Parse $(foo) and foo as the same (shfmt then converts the latter to the former)
  • Rename Quoted to DblQuoted for clarity
  • Split ((foo)) nodes as their own type, ArithmCmd
  • Add support for bash parameter expansion slicing

Binaries built on go version devel +8a2a999 Tue Nov 8 00:51:14 2016 +0000 linux/amd64.