edits+readability: rs-convert-standalone

Old
---
file: build/rs-convert-standalone/json/tutorial/convert-standalone-to-replica-set.json
source: source/tutorial/convert-standalone-to-replica-set.txt
stats:
   coleman-liau: 10.426016949152537
   flesch-ease: 54.4452652910833
   flesch-level: 10.763478260869565
   foggy:
      count: 25
      factor: 0.05296610169491525
      threshold: 3
   sentence-count: 23
   sentence-len-avg: 20
   smog-index: 9.085049710711278
   word-count: 472
New
---
file: build/rs-convert-standalone/json/tutorial/convert-standalone-to-replica-set.json
source: source/tutorial/convert-standalone-to-replica-set.txt
stats:
   coleman-liau: 10.236104513064134
   flesch-ease: 54.30201995249408
   flesch-level: 9.86881140142518
   foggy:
      count: 32
      factor: 0.07600950118764846
      threshold: 3
   sentence-count: 25
   sentence-len-avg: 16
   smog-index: 9.592334608150937
   word-count: 421