Fixes microsoft#183909 (microsoft#183940)

Author: hediet

src/vs/editor/contrib/inlineCompletions/browser/ghostText.ts

@@ -114,6 +114,10 @@ export class GhostTextReplacement {
 	get lineCount(): number {
 		return this.newLines.length;
 	}
+
+	isEmpty(): boolean {
+		return this.parts.every(p => p.lines.length === 0);
+	}
 }
 
 export type GhostTextOrReplacement = GhostText | GhostTextReplacement;

src/vs/editor/contrib/inlineCompletions/browser/inlineCompletionContextKeys.ts

@@ -33,7 +33,7 @@ export class InlineCompletionContextKeys extends Disposable {
 			const suggestion = model?.selectedInlineCompletion.read(reader);
 			const ghostText = model?.ghostText.read(reader);
 			const selectedSuggestItem = model?.selectedSuggestItem.read(reader);
-			this.inlineCompletionVisible.set(selectedSuggestItem === undefined && ghostText !== undefined);
+			this.inlineCompletionVisible.set(selectedSuggestItem === undefined && ghostText !== undefined && !ghostText.isEmpty());
 
 			if (ghostText && suggestion) {
 				this.suppressSuggestions.set(suggestion.inlineCompletion.source.inlineCompletions.suppressSuggestions);