specify localhost when initiating or else get "exception: cant use localhost in repl set member names except when using it for all members" on subsequent rs.add()
grammar (subject-verb agreement - number)
Update source/reference/database-statistics.txt

Add missing newline
minor: fixing tag aware sharding typo

"tag rage" lol
merge: whitespace correction
merge: title correction
minor: fixing cross reference
merge: replsetinitiate