minus sign in #set requires spaces to surround it
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                 Key: VELOCITY-542
                 URL: https://issues.apache.org/jira/browse/VELOCITY-542
             Project: Velocity
          Issue Type: Bug
          Components: Engine
    Affects Versions: 1.5
            Reporter: Will Glass-Husain
            Priority: Minor


The following example:

#set($thisCampNumber = 10)
#set($nextCampNumber = $thisCampNumber+1)
#set($previousCampNumber = $thisCampNumber-1)
#set($previousCampNumberB = $thisCampNumber - 1)

1: $thisCampNumber<br>
2: $nextCampNumber<br>
3: $previousCampNumber<br>
4: $previousCampNumberB<br>

produces this result

1: 10
2: 11
3: $previousCampNumber
4: 9


Note that using a minus sign in a #set statement does not work if there are no 
spaces around it.  (however, the same is not true for +).

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