message: Add Pi, varrho, varpi
diff: "body": "\\pi",
  "description": "pi"
  },
  + "varpi": {
  + "prefix": "@vp",
  + "body": "\\varpi",
  + "description": "varpi"
  + },
  "theta": {
  "prefix": "@q",
  "body": "\\theta",
  "body": "\\rho",
  "description": "rho"
  },
  + "varrho": {
  + "prefix": "@vr",
  + "body": "\\varrho",
  + "description": "varrho"
  + },
  "sigma": {
  "prefix": "@s",
  "body": "\\sigma",
  "body": "\\Lambda",
  "description": "Lambda"
  },
  + "Pi": {
  + "prefix": "@P",
  + "body": "\\Pi",
  + "description": "Pi"
  + },
  "Xi": {
  "prefix": "@X",
  "body": "\\Xi",
  