More Silent Hunter III Perl foo

I finally found a reason to mess with Perl’s sprintf for pretty reports. The result is easy to display output for the contents of the England to Murmansk convoy for 1941 to mid 1942. I only have about two dozen convoys left to research.

	Convoy PQ41Convoy:

Merchant Ships:

  Tanker                        2
     American
       Small Tanker             2     75%

  Cargo                         28
     American
       Small Merchant           2     75%
       Costal Merchant          5     80%
       C3 Cargo                 4     75%
       C2 Cargo                 4     50%
       Liberty Cargo            10   100%
     British
       Costal Merchant          2    100%
       C3 Cargo                 1    100%

Merchant Composition:

   GB:10% US:90%
   Small:36% Large:63%
   Supplies:70% Ammo:23% Oil:6%
   Tanker:6% Cargo:93% 

Escorts for Convoy:
  Corvette
     British
       any                       2   100%
  Frigate / Sloop
     British
       any                       2    50%
  Destroyer
     British
       any                       3   100%

Total Convoy Ships:             37