Refactor action ordering descriptions

textile/chat-features.textile

@@ -216,8 +216,8 @@ Broadly speaking, messages are published via REST calls to the Chat HTTP API and
 ** @(CHA-M2g)@ @[Testable]@ Two @Messages@ are considered to be the same if they have the same @serial@, that is to say, both @Serial@ strings are identical.
 * @(CHA-M10)@ A @Message@ can be modified by applying a new @action@ to it, such as an update or delete. Applying an @action@ generates a new @Message@ instance with an updated @latestActionSerial@, while the original Message’s @serial@ remains unchanged.
 ** @(CHA-M10a)@ @[Testable]@ The @latestActionSerial@ of a @Message@ is a lexicographically sortable, unique identifier for each action applied to the @Message@. Unlike @serial@, @latestActionSerial@ is mutable and is updated each time an @action@ is applied.
-** @(CHA-M10b)@ @[Testable]@ In global ordering, an @action@ is considered to occur before another @action@ if the @latestActionSerial@ of the first @action@ is lexicographically smaller than that of the latter.
-** @(CHA-M10c)@ @[Testable]@ In global ordering, an @action@ is considered to occur after another @action@ if the @latestActionSerial@ of the first @action@ is lexicographically greater than that of the latter.
+** @(CHA-M10b)@ @[Testable]@ In global ordering, an @action@ is considered to occur before another @action@ if the @latestActionSerial@ of the first @action@ is before the latter when lexicographically sorted.
+** @(CHA-M10c)@ @[Testable]@ In global ordering, an @action@ is considered to occur after another @action@ if the @latestActionSerial@ of the first @action@ is after the latter when lexicographically sorted.
 ** @(CHA-M10d)@ @[Testable]@ Two @actions@ are considered to be the same if they have the same @latestActionSerial@, that is to say, both @latestActionSerial@ strings are identical.
 * @(CHA-M3)@ A client must be able to send a message to a room via the Chat REST API.
 ** @(CHA-M3a)@ @[Testable]@ When a message is sent successfully, the caller shall receive a struct representing the "@Message@":#chat-structs-message in response, as if it were received via Realtime event.