Auto merge of #719 - Nemo157:patch-1, r=kbknapp
Auto merge of #719 - Nemo157:patch-1, r=kbknapp

docs: Fix typo in example `13a_enum_values_automatic`

kbknapp/clap-rs,clap-rs/clap,kbknapp/clap-rs,clap-rs/clap,clap-rs/clap