Redmine

The current implementation of the Version#wiki_page method evaluates project.wiki even when wiki_page_title is blank. This results in an unnecessary SQL query to the `wikis` table, even when such a query is avoidable.

The method can be optimized to only evaluate project.wiki if wiki_page_title is present, reducing a redundant SQL query and improving performance.

Current Implementation:

def wiki_page
  if project.wiki && !wiki_page_title.blank?
    @wiki_page ||= project.wiki.find_page(wiki_page_title)
  end
  @wiki_page
end

Proposed Change:

def wiki_page
  @wiki_page ||= project.wiki&.find_page(wiki_page_title) if wiki_page_title.present?
end