Mustache template cache incompatible with Redis

[rwd]

If the template cache is set to Redis, various errors are encountered preventing the templates from being rendered.

One example:

Mustache::Parser::SyntaxError

Illegal content in tag
  Line 11
    p.otag, p.ctag = ["{{", "}}"]

If the template cache is disabled, or set to ActiveSupport::Cache::MemoryStore, then this syntax error is not encountered, and the templates render fine.