Delete agent, slash command, variable more easily (microsoft#204651)

Author: roblourens

src/vs/workbench/contrib/chat/browser/contrib/chatInputEditorContrib.ts

@@ -646,8 +646,8 @@ class ChatTokenDeleter extends Disposable {
 				const deletableTokens = previousParsedValue.parts.filter(p => p instanceof ChatRequestAgentPart || p instanceof ChatRequestAgentSubcommandPart || p instanceof ChatRequestSlashCommandPart || p instanceof ChatRequestVariablePart);
 				deletableTokens.forEach(token => {
 					const deletedRangeOfToken = Range.intersectRanges(token.editorRange, change.range);
-					// Part of this token was deleted, and the deletion range doesn't go off the front of the token, for simpler math
-					if ((deletedRangeOfToken && !deletedRangeOfToken.isEmpty()) && Range.compareRangesUsingStarts(token.editorRange, change.range) < 0) {
+					// Part of this token was deleted, or the space after it was deleted, and the deletion range doesn't go off the front of the token, for simpler math
+					if (deletedRangeOfToken && Range.compareRangesUsingStarts(token.editorRange, change.range) < 0) {
 						// Assume single line tokens
 						const length = deletedRangeOfToken.endColumn - deletedRangeOfToken.startColumn;
 						const rangeToDelete = new Range(token.editorRange.startLineNumber, token.editorRange.startColumn, token.editorRange.endLineNumber, token.editorRange.endColumn - length);