RustTraining Python Book Chapter 12 Mermaid Syntax Error

[AloyBranCheung]

Description

The mermaid diagram under Comprehensions vs Iterator Chains is showing this error :

Unable to render rich display

Parse error on line 2:
...,3,4,5]"] -->|.iter\(\)| B["Iterator"]
-----------------------^
Expecting 'SQE', 'DOUBLECIRCLEEND', 'PE', '-)', 'STADIUMEND', 'SUBROUTINEEND', 'PIPE', 'CYLINDEREND', 'DIAMOND_STOP', 'TAGEND', 'TRAPEND', 'INVTRAPEND', 'UNICODE_TEXT', 'TEXT', 'TAGSTART', got 'PS'

For more information, see https://docs.github.com/get-started/writing-on-github/working-with-advanced-formatting/creating-diagrams#creating-mermaid-diagrams

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Actual code

flowchart LR
    A["Source<br/>[1,2,3,4,5]"] -->|.iter\(\)| B["Iterator"]
    B -->|.filter\(\|x\| x%2==0\)| C["[2, 4]"]
    C -->|.map\(\|x\| x*x\)| D["[4, 16]"]
    D -->|.collect\(\)| E["Vec&lt;i32&gt;<br/>[4, 16]"]
    style A fill:#ffeeba
    style E fill:#d4edda

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Solution

I would like to propose this solution for the fix

flowchart LR
    A["Source<br/>[1,2,3,4,5]"] -->|".iter()"| B["Iterator"]
    B -->|".filter(|x| x%2==0)"| C["[2, 4]"]
    C -->|".map(|x| x*x)"| D["[4, 16]"]
    D -->|".collect()"| E["Vec&lt;i32&gt;<br/>[4, 16]"]
    style A fill:#ffeeba
    style E fill:#d4edda

flowchart LR
    A["Source<br/>[1,2,3,4,5]"] -->|".iter()"| B["Iterator"]
    B -->|".filter(|x| x%2==0)"| C["[2, 4]"]
    C -->|".map(|x| x*x)"| D["[4, 16]"]
    D -->|".collect()"| E["Vec&lt;i32&gt;<br/>[4, 16]"]
    style A fill:#ffeeba
    style E fill:#d4edda

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