feat(core): update graph_mermaid.py #31577
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Correct the `_escape_node_label` method to be compatible with multilingual title names
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This pull request includes a refinement to the
_escape_node_labelfunction inlibs/core/langchain_core/runnables/graph_mermaid.py. The change improves the handling of special characters in Mermaid syntax by expanding the regex pattern to include additional characters.Key change:
libs/core/langchain_core/runnables/graph_mermaid.py: Updated the_escape_node_labelfunction to use a more comprehensive regex pattern (mermaid_special_chars) for escaping special characters in Mermaid syntax. This ensures better compatibility and avoids issues with unsupported characters.Correct the_escape_node_labelmethod to be compatible with multilingual title names