Cherry-pick PR #47830 into release-4.6 (#47928)

Component commits:
8f0e935 fix(47820): forbid extraction jsdoc

Co-authored-by: Oleksandr T <oleksandr.tarasiuk@outlook.com>

src/services/refactors/extractSymbol.ts

@@ -283,7 +283,7 @@ namespace ts.refactor.extractSymbol {
 
         // Walk up starting from the the start position until we find a non-SourceFile node that subsumes the selected span.
         // This may fail (e.g. you select two statements in the root of a source file)
-        const start = cursorRequest ? getExtractableParent(startToken): getParentNodeInSpan(startToken, sourceFile, adjustedSpan);
+        const start = cursorRequest ? getExtractableParent(startToken) : getParentNodeInSpan(startToken, sourceFile, adjustedSpan);
 
         // Do the same for the ending position
         const end = cursorRequest ? start : getParentNodeInSpan(endToken, sourceFile, adjustedSpan);
@@ -299,7 +299,7 @@ namespace ts.refactor.extractSymbol {
             return { errors: [createFileDiagnostic(sourceFile, span.start, length, Messages.cannotExtractRange)] };
         }
 
-        if (isJSDoc(start)) {
+        if (start.flags & NodeFlags.JSDoc) {
             return { errors: [createFileDiagnostic(sourceFile, span.start, length, Messages.cannotExtractJSDoc)] };
         }
 

tests/cases/fourslash/extract-jsdoc.ts

@@ -0,0 +1,9 @@
+/// <reference path='fourslash.ts' />
+
+/////**
+//// * /*a*//*b*/
+//// * {@link Foo}
+//// */
+
+goTo.select("a", "b");
+verify.not.refactorAvailableForTriggerReason("invoked", "Extract Symbol");