Sprint names surrounded by back ticks when appropriate

[stephen-swensen]

e.g. instead of

``

let hello world = 23;;
val ( hello world ) : int = 23

unquote <@ hello world @>;;
val it : UnquotedExpression =
hello world
23
``

do

``

let hello world = 23;;
val ( hello world ) : int = 23

unquote <@ hello world @>;;
val it : UnquotedExpression =
hello world
23
``

it appears we did some work related to this a long time ago, to support back-ticked names at all, but without outputting the actual back ticks: #87

[stephen-swensen]

Actually, this is in fact a duplicate of #87 we just forgot to implement the appropriate decompilation in recent ValueWithName