@lookup must be first thing; allow for shebang in scripts

ldoc/markup.lua

@@ -115,7 +115,7 @@ local function process_multiline_markdown(ldoc, txt, F)
    local indent,code,start_indent
    local_context = nil
    while line do
-      local name = line:match '@lookup%s+(%S+)'
+      local name = line:match '^@lookup%s+(%S+)'
       if name then
          local_context = name .. '.'
          line = getline()

ldoc/parse.lua

@@ -134,6 +134,13 @@ local function parse_file(fname,lang, package)
 
    local mod
    local t,v = tnext(tok)
+   if t == '#' then
+      while t and t ~= 'comment' do t,v = tnext(tok) end
+      if t == nil then
+         F:warning('empty file')
+         return nil
+      end
+   end
    if lang.parse_module_call and t ~= 'comment'then
       while t and not (t == 'iden' and v == 'module') do
          t,v = tnext(tok)