Syntax: Add Floating Point Hex Exponents to syntax highlighting

[spotandjake]

add highlighting for syntax like 0x1.4Ap5

[spotandjake]

I think

{
    "match": "\\b(0[xX][\\da-fA-F]+)(\\.[\\da-fA-F]*)?([p`P][+-]?\\d[\\d_]*)?([fdwW]?)\\b",
    "name": "constant.numeric.grain",
    "captures": {
      "4": {
        "name": "entity.name.type.numeric.grain"
      }
    }
  },

that should do it add that on line 840. But my textmate isnt good enough that i know for sure.