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cf3-tutorial's Issues

Signals are case sensitive

They must be lower case:

[root@cfengine01 source]# cf-agent -KI -f ./250-020-Processes-0260-Terminating_a_process.cf
./250-020-Processes-0260-Terminating_a_process.cf:9:38: error: Selection is out of bounds
        signals => { "TERM", "KILL" };
                                     ^
   error: There are syntax errors in policy files
   error: Policy failed validation with command '"/var/cfengine/bin/cf-promises" -c "./250-020-Processes-0260-Terminating_a_process.cf"'
   error: Failsafe condition triggered. Interactive session detected, skipping failsafe.cf execution.
   error: Error reading CFEngine policy. Exiting...

add mergedata() example

bundle agent main
{
  vars:
      "global" data => parsejson('{ "fruit": "banana", "drink": "pepsi" }');
      "override" data => parsejson('{ "drink": "coke" }');

      "merged_global_and_override" data => mergedata("global", "override");
      "merged_global_and_override_str" string => format("%S", merged_global_and_override);
  reports:
      "$(merged_global_and_override_str)";
}

output:

test.cf                                                                                                                                                                                                                                      
[root@host ~]# cf-agent -f ./test.cf

R: {"drink":"coke","fruit":"banana"}
[root@host ~]# 

Improve exercise numbering

Since the numbering of the exercises is independent from the numbering of the example listings, it is unclear where to scroll to find a particular numbered exercise.

This was pointed out by one of today's students (Vincent) as throwing him off.

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