Improve a regular expression that appears twice in the exampleswhich could lead to quadratic runtime if the input is crafted tomatch /\{+/ plus some rejecting suffix.In these examples this is unlikely since the markdown files areprobably trusted. This change is mostly focussed towards anyonethat starts from the examples and expands to cases where themarkdown files may not be trusted (i.e., user-provided templates).Technically this changes the behavior of these examples, becausenames may no longer contain a '{', but given they're just examplesthis "breaking change" seems acceptable to me.Signed-off-by: Eric Cornelissen <ericornelissen@gmail.com>