map command suggest invalid command

[nus-pe-script]

Describe the bug
Mapping command should map points to volunteers with different criteria but when map command is executed, the result display shows unknown command.

To Reproduce
Steps to reproduce the behavior:

1. add afew volunteers with addVolunteer command
2. execute map t/value+criteria

Expected behavior
Points should be allocated to volunteers who's credentials match the criteria.

Screenshots

Additional context
Add any other context about the problem here.

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Reported by: @jemine1998
Severity: Low

_{[original: nusCS2113-AY1819S2/pe-dry-run#114]}

[ndhuu]

We have fixed this. Thank you