message: Enable snippets usage on selected text
  Changed text style snippets to enable them to be used on selected texts
diff: },
  "bf" : {
  "prefix": "FBF",
  - "body": "\\textbf{$1}",
  + "body": "\\textbf{${1:${TM_SELECTED_TEXT:text}}}",
  "description": "Use a bold font"
  },
  "it" : {
  "prefix": "FIT",
  - "body": "\\textit{$1}",
  + "body": "\\textit{${1:${TM_SELECTED_TEXT:text}}}",
  "description": "Use an italic font"
  },
  "em" : {
  "prefix": "FEM",
  - "body": "\\emph{$1}",
  + "body": "\\emph{${1:${TM_SELECTED_TEXT:text}}}",
  "description": "Use an emphasis font"
  },
  "tt" : {
  "prefix": "FTT",
  - "body": "\\texttt{$1}",
  + "body": "\\texttt{${1:${TM_SELECTED_TEXT:text}}}",
  "description": "Use a typewriter font"
  },
  /* Insert Gree letter with @ + corresponding latin letter */
  