improve ftdetect. #2

ftdetect/jinja.vim

@@ -1 +1,13 @@
-au BufNewFile,BufRead *.html,*.htm,*.shtml,*.stm if &ft == 'htmldjango' | set ft=jinja | endif
+" Figure out which type of hilighting to use for html.
+fun! s:SelectHTML()
+let n = 1
+while n < 50 && n < line("$")
+  " check for jinja
+  if getline(n) =~ '{%\s*\(extends\|block\|macro\|set\|if\|for\|include\|trans\)\>'
+    set ft=jinja
+    return
+  endif
+    let n = n + 1
+  endwhile
+endfun
+autocmd BufNewFile,BufRead *.jinja2,*.jinja,*.html,*.htm  call s:SelectHTML()