That rspec example looks like some sort of misguided language skeuomorphism. "If I name this method 'it' and this one 'should' and this one 'subject', I get something that sort of looks like English if you read it out loud while skipping the symbols! Isn't that neat?"
Well, no, it's a horrible idea, because in English those words would imply a certain syntax tree, while the actual syntax tree in your DSL is completely different, and those words have completely different roles from the ones they have in English. So you have something that superficially looks like English if you take care to arrange it just right, but in fact works in a completely different way from how you know English to work.
It's like having a picture of a sliding knob in your application, except instead of sliding it you're supposed to click it, and it's actually used as a tab switcher. And you put a denim texture on it.
Well, no, it's a horrible idea, because in English those words would imply a certain syntax tree, while the actual syntax tree in your DSL is completely different, and those words have completely different roles from the ones they have in English. So you have something that superficially looks like English if you take care to arrange it just right, but in fact works in a completely different way from how you know English to work.
It's like having a picture of a sliding knob in your application, except instead of sliding it you're supposed to click it, and it's actually used as a tab switcher. And you put a denim texture on it.