key = "value"
bare_key = "value"
bare-key = "value"
1234 = "value"

"127.0.0.1" = "value"
"character encoding" = "value"
"ʎǝʞ" = "value"
'key2' = "value"
'quoted "value"' = "value"

"" = "value"
'' = "value"