Nested tuples syntax, expecting token

[faustinoaq]

crystal 0.20.3

Code:

{
  { "a", "b" }
}

Output: Syntax error in eval:2: expecting token '=>', not 'NEWLINE'

Solutions?:

1. With comma at end:

{
  { "a", "b" },
}

2. With brace at end:

{
  { "a", "b" }}

Also comma isn't needed when the tuple have 2 nested tuples or more:

t = {
  {"a", "b"},
  {"a", "b"}
}

But, crystal tool format always add comma at the end.

# After crystal tool format
t = {
  {"a", "b"},
  {"a", "b"},
}

Happy Christmas! 🎄