OrchardCMS/OrchardDoc — pull request #135 by rtpHarry (2014-11-16 23:57:26+00:00)
Title: remove notice to say format with spaces not tabs

both are valid now according to the ExtensionHarvester.cs file:

private static bool IsFeatureFieldDeclaration(string line) {
if (line.StartsWith("\t\t") ||
line.StartsWith("\t ") ||
line.StartsWith(" ") ||
line.StartsWith(" \t"))
return true;

return false;
}