fix(mcp): keep the phrase-and-keyword search example valid Python

The docstring wrote the example with \"exact phrase\" escapes. Python
resolves them when the module loads, so the tool description sent to
clients (and the generated reference) read

    search_notes(""exact phrase" AND keyword", ...)

which is not valid Python and cannot be copied. Use single outer quotes
so the rendered call is valid as written.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014pmKq6bqCi6Zp6BTHuZjrp
Signed-off-by: phernandez <paul@basicmachines.co>

Author: phernandez

docs/mcp-tools.md

@@ -417,7 +417,7 @@ metadata_filters, that value wins.
 
 ##### Advanced Pattern Examples
 - `search_notes("project AND (meeting OR discussion)", project="work-project")` - Complex boolean logic
-- `search_notes(""exact phrase" AND keyword", project="research")` - Combine phrase and keyword search
+- `search_notes('"exact phrase" AND keyword', project="research")` - Combine phrase and keyword search
 - `search_notes("bug NOT fixed", project="dev-notes")` - Exclude resolved issues
 - `search_notes("docs/2024-*", project="archive", search_type="permalink")` - Year-based permalink search
 

src/basic_memory/mcp/tools/search.py

@@ -868,7 +868,7 @@ async def search_notes(
 
     ### Advanced Pattern Examples
     - `search_notes("project AND (meeting OR discussion)", project="work-project")` - Complex boolean logic
-    - `search_notes("\"exact phrase\" AND keyword", project="research")` - Combine phrase and keyword search
+    - `search_notes('"exact phrase" AND keyword', project="research")` - Combine phrase and keyword search
     - `search_notes("bug NOT fixed", project="dev-notes")` - Exclude resolved issues
     - `search_notes("docs/2024-*", project="archive", search_type="permalink")` - Year-based permalink search