(doc) Fix documentation for puppet strings

Before (25.68%)

      Files:          74
      Modules:         0 (    0 undocumented)
      Classes:         0 (    0 undocumented)
      Constants:       0 (    0 undocumented)
      Methods:         0 (    0 undocumented)
      Puppet Classes:    66 (   50 undocumented)
      Puppet Types:     8 (    5 undocumented)
       25.68% documented

After (100%)

      Files:          74
      Modules:         0 (    0 undocumented)
      Classes:         0 (    0 undocumented)
      Constants:       0 (    0 undocumented)
      Methods:         0 (    0 undocumented)
      Puppet Classes:    66 (    0 undocumented)
      Puppet Types:     8 (    0 undocumented)
       100.00% documented
Merge pull request #702 from enovance/puppet-strings

(doc) Fix documentation for puppet strings