[CONFSERVER-37091] Codeblock macro converts tab to 4x ASCII 194 characters.

NOTE: This bug report is for Confluence Server. Using Confluence Cloud? See the corresponding bug report.

Steps to reproduce:

Write some source code under code block macro on a Confluence page.
Make sure you "tab" on every new line.
Save the page
Double click to select, the copy then text.
Paste it on a text editor and tabs will be replaced for spaces.
Copy one of the spaces to the clipboard
Go to http://repl.it/languages/PHP
Type:
```
 ord('[paste]'); 
```
where [paste] is Ctrl-V, pasting from the clipboard.
The result you get is 194
Now just type:
```
 ord(' '); 
```
with a normal spacebar space. The result you get is 32.

relates to

CONFCLOUD-37091 Codeblock macro converts tab to 4x ASCII 194 characters.

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