spec: Issue around recipients.txt, …

[mykhal]

The spec (2021-05-17) section

Encryption to a list of recipients in a file (not recursive, can’t point to other files)

$ echo ‐r age1p4fuklglxqsgg602hu4c4jl4aunu5tynyf4lkg96ezh3jefzpy6swshp5x >>
recipients.txt
$ echo ‐r age1t7r9prsqc3w3x4auqq7y8zplrfsddmf8z97hct68gmhea2l34f9q63h2kp >>
recipients.txt
$ tar cv ~/xxx | age ‐r recipients.txt > xxx.tar.age

has some incorrect command options/params.

What was meant (according to the current state):

• $ echo age1… >> recipients.txt (2×)
• … age -R recipients.txt …

(Also note unfortunate command line wrapping in this and some other code samples in the spec.)