readability: rs-secondary

Before
---
file: build/rs-secondary/json/core/replica-set-secondary.json
source: source/core/replica-set-secondary.txt
stats:
   coleman-liau: 12.80405594405594
   flesch-ease: 32.38998834498838
   flesch-level: 12.124925074925077
   foggy:
      count: 33
      factor: 0.11538461538461539
      threshold: 3
   sentence-count: 21
   sentence-len-avg: 13
   smog-index: 10.290406445055957
   word-count: 286

After
---
file: build/rs-secondary/json/core/replica-set-secondary.json
source: source/core/replica-set-secondary.txt
stats:
   coleman-liau: 11.872693498452012
   flesch-ease: 37.07387413669926
   flesch-level: 11.174504643962852
   foggy:
      count: 36
      factor: 0.11145510835913312
      threshold: 3
   sentence-count: 26
   sentence-len-avg: 12
   smog-index: 9.851270322608155
   word-count: 323

Signed-off-by: Sam Kleinman <samk@10gen.com>
minor: edits