Code Block Macro doesn't retain JSON formatting in Confluence 7.7.3 and above

Problem

Copy and pasted JSON isn't formatted correctly when inserted into the Code Block Macro. The JSON loses it's formatting and doesn't retain the correct structure once pasted into the block. 

Environment

Confluence 7.7.3 > 

Steps to Reproduce

• Add a code block macro to a page
• Copy and paste a block of formatted JSON into the macro:

• {
      "glossary": {
          "title": "example glossary",
  		"GlossDiv": {
              "title": "S",
  			"GlossList": {
                  "GlossEntry": {
                      "ID": "SGML",
  					"SortAs": "SGML",
  					"GlossTerm": "Standard Generalized Markup Language",
  					"Acronym": "SGML",
  					"Abbrev": "ISO 8879:1986",
  					"GlossDef": {
                          "para": "A meta-markup language, used to create markup languages such as DocBook.",
  						"GlossSeeAlso": ["GML", "XML"]
                      },
  					"GlossSee": "markup"
                  }
              }
          }
      }
  } 

Expected Results

We expect that the JSON will retain it's formatting, as in the example box above. 

Actual Results

Instead the code block strips the white. space from the JSON strips all white space resulting in the something like the following:

{
"glossary": {
"title": "example glossary",
"GlossDiv": {
"title": "S",
"GlossList": {
"GlossEntry": {
"ID": "SGML",
"SortAs": "SGML",
"GlossTerm": "Standard Generalized Markup Language",
"Acronym": "SGML",
"Abbrev": "ISO 8879:1986",
"GlossDef": {
"para": "A meta-markup language, used to create markup languages such as DocBook.",
"GlossSeeAlso": ["GML", "XML"]
},
"GlossSee": "markup"
}
}
}
}
} 

Workaround

(Add a workaround, if available)

Notes