the end of the deleted Range (inclusive). DeleteLen was not always
accurate because editors normalize \r\n to \n in some cases, affecting
the length of ranges. In Diagnostic response items, changed len field
to end to address the same range length issue. Flattened
MessageDiagnosticChains in diagnostic message text, since clients expect
string there. Renamed ts.server.protocol to simply protocol in
session.ts and client.ts since module name prefix is clear.
Based on protocol feedback: Changed LineCol to Location. Changed
CodeLocation interface name prefix to FileLocation. Changed DiagEvent
to DiagnosticEvent. Removed anonymous types.
