Redmine

1. Go to settings
2. choose "Markdown (experimental)" as Text formatting.
3. Go to any WIKI page, crate new page.

The new page will have heading

# Heading test

Instead of default Markdown heading formatting:

Heading test
===

Environment:
  Redmine version                3.0.1.stable
  Ruby version                   1.9.3-p194 (2012-04-20) [i486-linux]
  Rails version                  4.2.0
  Environment                    production
  Database adapter               Mysql2
SCM:
  Subversion                     1.6.17
  Mercurial                      2.2.2
  Git                            1.7.10.4
  Filesystem                     
Redmine plugins:
  add_link                       0.0.1
  redmine_changeauthor           1.0.0
  redmine_custom_css             0.1.4
  redmine_improved_searchbox2    0.0.3
  redmine_lightbox2              0.2.2