Remove BLOG_DIR from blog errors without breaking the blog

i2p2www/blog/views.py

@@ -1,7 +1,7 @@
 from flask import abort, render_template, request
 from werkzeug.contrib.atom import AtomFeed
 
-from i2p2www import BLOG_POSTS_PER_FEED, BLOG_POSTS_PER_PAGE, cache
+from i2p2www import BLOG_DIR, BLOG_POSTS_PER_FEED, BLOG_POSTS_PER_PAGE, cache
 from i2p2www.blog.helpers import get_blog_posts, get_blog_feed_items, get_date_from_slug, get_metadata_from_meta, render_blog_post
 from i2p2www.helpers import Pagination, get_for_page
 
@@ -29,6 +29,8 @@ def blog_post(slug):
     if parts:
         meta = get_metadata_from_meta(parts['meta'])
         meta['date'] = meta['date'] if meta['date'] else get_date_from_slug(slug)
+        # remove BLOG_DIR from any error messages
+        parts['fragment'] = parts['fragment'].replace(BLOG_DIR, 'Blog')
         # now just pass to simple template file and we are done
         return render_template('blog/post.html', parts=parts, title=parts['title'], body=parts['fragment'], slug=slug, meta=meta)
     else: