JIRA Issues Macro shows empty column data if column names have spaces between them

If I have a space between column names in the JIRA Issues macro, data is only shown in the first column. The other columns have headings but no data.

These are OK:
key;summary;labels;description;acceptance criteria
key,summary,labels,description,acceptance criteria

These only show data in the Key column:
key; summary; labels; description; acceptance criteria
key, summary, labels, description, acceptance criteria

Suggested solution: Spaces should be allowed.

The documentation also needs to be fixed as it is inconsistent between the text in the Macro edit box and the online documentation.

Relates to CONF-27354 and CONF-28632

Steps to Reproduce

1. Link Confluence and JIRA
2. Create a page with a JIRA Issues Macro
3. In the macro, enter 'key; description' under Columns - ensuring there is a space between the two
   • You will see that only the Key is displayed
4. Swap the order of the columns - 'description; key', again ensuring there is a space
   • You will see that the description is now displayed and the key is not.
5. Now enter 'description;key' or 'key;description' with NO space
   • You will see that all columns display correctly.