[doc] Minor typographical edits
[doc] Minor typographical edits

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afh/ledger,paulbdavis/ledger,duncanmortimer/ledger,paulbdavis/ledger,afh/ledger,duncanmortimer/ledger,paulbdavis/ledger,afh/ledger,afh/ledger,duncanmortimer/ledger,duncanmortimer/ledger,ledger/ledger,paulbdavis/ledger,ledger/ledger,paulbdavis/ledger,ledger/ledger,paulbdavis/ledger,duncanmortimer/ledger,ledger/ledger,afh/ledger,duncanmortimer/ledger,duncanmortimer/ledger,paulbdavis/ledger,ledger/ledger