gantt: sections can't have a colon

[rhz]

Something like

gantt
  ...
  section First goal: Build a greenhouse
  ...

produces the following error when rendered using mermaid.cli

(node:23207) UnhandledPromiseRejectionWarning: Error: Evaluation failed: Error: Parse error on line 5:
...  section First goal: Build a greenhouse
-----------------------^
Expecting 'EOF', 'SPACE', 'NL', 'dateFormat', 'axisFormat', 'title', 'section', 'taskTxt', got 'taskData'

[mike-usa]

Try using the HTML encoded character without the ampersand; e.g., #58; or #colon;

[rhz]

Thanks for the suggestion @mikeblume! It works!

I've been using my own modified copy of the code as described in #743, so I don't know if it works on the last version from this repo. I'll nevertheless close the issue and if anyone still has the problem we can re-open it.