[Minor] Ical: Allow \r as line endings

lualib/lua_content/ical.lua

@@ -23,7 +23,7 @@ local ical_grammar
 local function gen_grammar()
   if not ical_grammar then
     local wsp = l.S(" \t\v\f")
-    local crlf = l.P"\r"^-1 * l.P"\n"
+    local crlf = (l.P"\r"^-1 * l.P"\n") + l.P"\r"
     local eol = (crlf * #crlf) + (crlf - (crlf^-1 * wsp))
     local name = l.C((l.P(1) - (l.P":"))^1) / function(v) return (v:gsub("[\n\r]+%s","")) end
     local value = l.C((l.P(1) - eol)^0) / function(v) return (v:gsub("[\n\r]+%s","")) end