Add optionalReplacementSpan to completions response (#40347)

* Add optionalReplacementRange to completions response

* Get the name right

* Fix unit tests

* Fix comment typo

* Fix comment typo

* Baseline

src/testRunner/unittests/tsserver/completions.ts

@@ -44,6 +44,7 @@ namespace ts.projectSystem {
                 isGlobalCompletion: true,
                 isMemberCompletion: false,
                 isNewIdentifierLocation: false,
+                optionalReplacementSpan: { start: { line: 1, offset: 1 }, end: { line: 1, offset: 4 } },
                 entries: [entry],
             });
 

src/testRunner/unittests/tsserver/metadataInResponse.ts

@@ -80,6 +80,10 @@ namespace ts.projectSystem {
                     isGlobalCompletion: false,
                     isMemberCompletion: true,
                     isNewIdentifierLocation: false,
+                    optionalReplacementSpan: {
+                        start: { line: 1, offset: aTs.content.indexOf("prop;") + 1 },
+                        end: { line: 1, offset: aTs.content.indexOf("prop;") + 1 + "prop".length }
+                    },
                     entries: expectedCompletionEntries
                 });
             });