postgresql.aug: Allow hyphen '-' in values that don't require quotes (#…

…700) (#701)

Since PostgreSQL 10 password_encryption is enum.
If the value is set to scram-sha-256 (which contains hyphens),
saving postgresql.conf with augeas fails with:

saving failed (run 'errors' for details)
Error in /var/lib/pgsql/13/data/postgresql.conf:782.0 (parse_skel_failed)
  Iterated lens matched less than it should
  Lens: /usr/share/augeas/lenses/dist/postgresql.aug:69.10-.46:
    Last matched: /usr/share/augeas/lenses/dist/postgresql.aug:30.10-.46:
    Next (no match): /usr/share/augeas/lenses/dist/quote.aug:117.2-.35:

This is because hyphen wasn't included in the definition of string
that doesn't require quoting.

Co-authored-by: Raphaël Pinson <[email protected]>

lenses/postgresql.aug

@@ -31,7 +31,7 @@ let sep = del /([ \t]+)|([ \t]*=[ \t]*)/ " = "
 
 (* Variable: word_opt_quot_re
      Strings that don't require quotes *)
-let word_opt_quot_re = /[A-Za-z][A-Za-z0-9_]*/
+let word_opt_quot_re = /[A-Za-z][A-Za-z0-9_-]*/
 
 (* View: word_opt_quot
      Storing a <word_opt_quot_re>, with or without quotes *)

lenses/tests/test_postgresql.aug

@@ -107,6 +107,7 @@ lc_messages = 'en_US.UTF-8'
 log_filename = log
 archive_command = 'tar \'quoted option\''
 search_path = '\"$user\",public'
+password_encryption = scram-sha-256
 "
 test Postgresql.lns get string_quotes =
   { "listen_addresses" = "localhost" }
@@ -115,6 +116,7 @@ test Postgresql.lns get string_quotes =
   { "log_filename" = "log" }
   { "archive_command" = "tar \'quoted option\'" }
   { "search_path" = "\"$user\",public" }
+  { "password_encryption" = "scram-sha-256" }
 test Postgresql.lns put string_quotes after
   set "stats_temp_directory" "foo_bar";
   set "log_filename" "postgresql-%Y-%m-%d_%H%M%S.log";
@@ -124,6 +126,7 @@ lc_messages = 'en_US.UTF-8'
 log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log'
 archive_command = 'tar \'quoted option\''
 search_path = '\"$user\",public'
+password_encryption = scram-sha-256
 log_statement = 'none'
 "