Fixes microsoft#135440 by allowing the preselection range to be longer than the range of the preselected item.

Author: hediet

src/vs/editor/contrib/inlineCompletions/suggestWidgetInlineCompletionProvider.ts

@@ -94,7 +94,7 @@ export class SuggestWidgetInlineCompletionProvider extends Disposable {
 								return undefined;
 							}
 							const valid =
-								normalizedSuggestItem.range.equalsRange(normalizedItemToPreselect.range) &&
+								rangeStartsWith(normalizedItemToPreselect.range, normalizedSuggestItem.range) &&
 								normalizedItemToPreselect.text.startsWith(normalizedSuggestItem.text);
 							return { index, valid, prefixLength: normalizedSuggestItem.text.length, suggestItem };
 						})
@@ -190,6 +190,16 @@ export class SuggestWidgetInlineCompletionProvider extends Disposable {
 	}
 }
 
+function rangeStartsWith(rangeToTest: Range, prefix: Range): boolean {
+	return (
+		rangeToTest.startLineNumber === prefix.startLineNumber &&
+		rangeToTest.startColumn === prefix.startColumn &&
+		(rangeToTest.endLineNumber < prefix.endLineNumber ||
+			(rangeToTest.endLineNumber === prefix.endLineNumber &&
+				rangeToTest.endColumn <= prefix.endColumn))
+	);
+}
+
 function suggestionToInlineCompletion(suggestController: SuggestController, position: Position, item: CompletionItem, toggleMode: boolean): NormalizedInlineCompletion | undefined {
 	// additionalTextEdits might not be resolved here, this could be problematic.
 	if (Array.isArray(item.completion.additionalTextEdits) && item.completion.additionalTextEdits.length > 0) {