Fix escaped negation in transient-check examples and table formatting

The KNOWN_OAUTH_ERROR_CODES examples carried a stray backslash before
the negation operator, making the snippets invalid TypeScript when
copied. The client-side context note sat mid-table between the task
rows with a non-symbol left cell; it now reads as prose after the
mapping table, matching how migration.md presents it.

Author: felixweinberger

docs/migration-SKILL.md

@@ -218,7 +218,7 @@ import { OAuthError, OAuthErrorCode } from '@modelcontextprotocol/client';
 if (error instanceof OAuthError && error.code === OAuthErrorCode.InvalidClient) { ... }
 ```
 
-The code property is `error.code` (`OAuthErrorCode | string`). Behavioral trap: v1 collapsed unrecognized response error codes into `ServerError`; v2 preserves the raw code. When rewriting `instanceof ServerError` retry/transient checks, treat unknown codes as transient to preserve v1 behavior: `\!new Set<string>(Object.values(OAuthErrorCode)).has(error.code)`.
+The code property is `error.code` (`OAuthErrorCode | string`). Behavioral trap: v1 collapsed unrecognized response error codes into `ServerError`; v2 preserves the raw code. When rewriting `instanceof ServerError` retry/transient checks, treat unknown codes as transient to preserve v1 behavior: `!new Set<string>(Object.values(OAuthErrorCode)).has(error.code)`.
 
 **Unchanged APIs** (only import paths changed): `Client` constructor and most methods, `McpServer` constructor, `server.connect()`, `server.close()`, all client transports (`StreamableHTTPClientTransport`, `SSEClientTransport`, `StdioClientTransport`), `StdioServerTransport`, all
 Zod schemas, all callback return types. Note: `callTool()` and `request()` signatures changed (schema parameter removed, see section 11).
@@ -452,10 +452,11 @@ Request/notification params remain fully typed. Remove unused schema imports aft
 | `extra.closeSSEStream`           | `ctx.http?.closeSSE` (only `ServerContext`)                                |
 | `extra.closeStandaloneSSEStream` | `ctx.http?.closeStandaloneSSE` (only `ServerContext`)                      |
 | `extra.taskStore`                | `ctx.task?.store`                                                          |
-| (applies client-side too)        | `ClientContext` = `BaseContext`; client handler mocks need `{ mcpReq: { signal, id, ... } }` |
 | `extra.taskId`                   | `ctx.task?.id`                                                             |
 | `extra.taskRequestedTtl`         | `ctx.task?.requestedTtl`                                                   |
 
+The same restructure applies client-side: `ClientContext` = `BaseContext`, so client-side handlers (elicitation, sampling, roots) receive the same `ctx` shape, and client handler mocks must provide `{ mcpReq: { signal, id, ... } }` rather than the v1 flat `extra` object.
+
 `ServerContext` convenience methods (new in v2, no v1 equivalent):
 
 | Method                                         | Description                                            | Replaces                                             |

docs/migration.md

@@ -928,7 +928,7 @@ const isTransient =
     (error.code === OAuthErrorCode.ServerError ||
         error.code === OAuthErrorCode.TemporarilyUnavailable ||
         error.code === OAuthErrorCode.TooManyRequests ||
-        \!KNOWN_OAUTH_ERROR_CODES.has(error.code));
+        !KNOWN_OAUTH_ERROR_CODES.has(error.code));
 ```
 
 ### Experimental: `TaskCreationParams.ttl` no longer accepts `null`