Fix intent collection in Display implementation

[kylak]

This PR removes such an error (the code of the main function is the one in the Readme) :

cargo run
    Updating git repository `https://github.com/diracdeltafunk/fcars`
     Locking 1 package to latest Rust 1.91.1 compatible version
      Adding fcars v0.1.0 (https://github.com/diracdeltafunk/fcars#e4e3cdcb)
   Compiling fcars v0.1.0 (https://github.com/diracdeltafunk/fcars#e4e3cdcb)
   Compiling test_fca v0.1.0 (/home/gustav/cursor/test_fca)
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.69s
     Running `target/debug/test_fca`
Context:
              0    1    2    3    4    5    6    7    8    9   10   11
         0    0    0    0    0    1    1    1    1    1    1    1    0
         1    1    1    0    1    1    1    1    0    1    0    0    1
         2    1    1    1    1    0    1    1    1    0    0    0    1
         3    1    1    1    1    1    1    1    1    0    1    1    1
         4    1    1    1    1    1    0    1    1    1    1    1    1
         5    1    1    0    1    1    0    1    1    1    0    1    1
         6    1    1    1    1    0    0    1    1    1    1    1    1
         7    1    0    1    1    1    1    1    1    1    0    1    1
         8    1    1    0    1    0    1    1    1    1    0    1    0
         9    1    1    0    1    0    1    1    1    1    1    0    1

Reduced? false

Extent: [], Intent: []
Extent: [3], Intent: [3]
Extent: [4], Intent: [4]
Extent: [3, 4], Intent: [3, 4]
Extent: [2, 3], Intent: [2, 3]
Extent: [4, 6], Intent: [4, 6]
Extent: [3, 4, 6], Intent: [3, 4, 6]
Extent: [2, 3, 4, 6], Intent: [2, 3, 4, 6]
Extent: [1], Intent: [1]
Extent: [1, 3], Intent: [1, 3]
Extent: [4, 5], Intent: [4, 5]
Extent: [3, 4, 5], Intent: [3, 4, 5]
Extent: [1, 4, 5], Intent: [1, 4, 5]
Extent: [1, 3, 4, 5], Intent: [1, 3, 4, 5]
Extent: [9], Intent: [9]
Extent: [8], Intent: [8]
Extent: [8, 9], Intent: [8, 9]
Extent: [3, 9], Intent: [3, 9]
Extent: [3, 8], Intent: [3, 8]
Extent: [2, 3, 9], Intent: [2, 3, 9]
Extent: [2, 3, 8, 9], Intent: [2, 3, 8, 9]
Extent: [1, 9], Intent: [1, 9]
Extent: [1, 8, 9], Intent: [1, 8, 9]
Extent: [1, 2, 3, 9], Intent: [1, 2, 3, 9]
Extent: [1, 2, 3, 8, 9], Intent: [1, 2, 3, 8, 9]
Extent: [4, 6, 9], Intent: [4, 6, 9]
Extent: [4, 5, 6], Intent: [4, 5, 6]
Extent: [4, 5, 6, 8], Intent: [4, 5, 6, 8]
Extent: [4, 5, 6, 9], Intent: [4, 5, 6, 9]
Extent: [4, 5, 6, 8, 9], Intent: [4, 5, 6, 8, 9]
Extent: [3, 4, 6, 9], Intent: [3, 4, 6, 9]
Extent: [3, 4, 5, 6], Intent: [3, 4, 5, 6]
Extent: [3, 4, 5, 6, 8], Intent: [3, 4, 5, 6, 8]
Extent: [2, 3, 4, 5, 6, 9], Intent: [2, 3, 4, 5, 6, 9]
Extent: [2, 3, 4, 5, 6, 8, 9], Intent: [2, 3, 4, 5, 6, 8, 9]
Extent: [1, 4, 5, 6, 9], Intent: [1, 4, 5, 6, 9]
Extent: [1, 4, 5, 6, 8, 9], Intent: [1, 4, 5, 6, 8, 9]
Extent: [1, 2, 3, 4, 5, 6, 9], Intent: [1, 2, 3, 4, 5, 6, 9]
Extent: [1, 2, 3, 4, 5, 6, 8, 9], Intent: [1, 2, 3, 4, 5, 6, 8, 9]
Extent: [7], Intent: [7]
Extent: [3, 7], Intent: [3, 7]
Extent: [4, 7], Intent: [4, 7]
Extent: [3, 4, 7], Intent: [3, 4, 7]
Extent: [2, 3, 7], Intent: [2, 3, 7]
Extent: [4, 6, 7], Intent: [4, 6, 7]
Extent: [3, 4, 6, 7], Intent: [3, 4, 6, 7]
Extent: [2, 3, 4, 6, 7], Intent: [2, 3, 4, 6, 7]
Extent: [1, 7], Intent: [1, 7]
Extent: [1, 3, 7], Intent: [1, 3, 7]
Extent: [4, 5, 7], Intent: [4, 5, 7]
Extent: [3, 4, 5, 7], Intent: [3, 4, 5, 7]
Extent: [1, 4, 5, 7], Intent: [1, 4, 5, 7]
Extent: [1, 3, 4, 5, 7], Intent: [1, 3, 4, 5, 7]
Extent: [7, 8], Intent: [7, 8]
Extent: [7, 9], Intent: [7, 9]
Extent: [7, 8, 9], Intent: [7, 8, 9]
Extent: [3, 7, 8], Intent: [3, 7, 8]
Extent: [2, 3, 7, 9], Intent: [2, 3, 7, 9]
Extent: [2, 3, 7, 8, 9], Intent: [2, 3, 7, 8, 9]
Extent: [1, 7, 9], Intent: [1, 7, 9]
Extent: [1, 7, 8, 9], Intent: [1, 7, 8, 9]
Extent: [1, 2, 3, 7, 9], Intent: [1, 2, 3, 7, 9]
Extent: [1, 2, 3, 7, 8, 9], Intent: [1, 2, 3, 7, 8, 9]
Extent: [4, 5, 6, 7], Intent: [4, 5, 6, 7]
Extent: [4, 5, 6, 7, 8], Intent: [4, 5, 6, 7, 8]
Extent: [4, 5, 6, 7, 9], Intent: [4, 5, 6, 7, 9]
Extent: [4, 5, 6, 7, 8, 9], Intent: [4, 5, 6, 7, 8, 9]
Extent: [3, 4, 5, 6, 7], Intent: [3, 4, 5, 6, 7]
Extent: [3, 4, 5, 6, 7, 8], Intent: [3, 4, 5, 6, 7, 8]
Extent: [2, 3, 4, 5, 6, 7, 9], Intent: [2, 3, 4, 5, 6, 7, 9]
Extent: [2, 3, 4, 5, 6, 7, 8, 9], Intent: [2, 3, 4, 5, 6, 7, 8, 9]
Extent: [1, 4, 5, 6, 7, 9], Intent: [1, 4, 5, 6, 7, 9]
Extent: [1, 4, 5, 6, 7, 8, 9], Intent: [1, 4, 5, 6, 7, 8, 9]
Extent: [1, 2, 3, 4, 5, 6, 7, 9], Intent: [1, 2, 3, 4, 5, 6, 7, 9]
Extent: [1, 2, 3, 4, 5, 6, 7, 8, 9], Intent: [1, 2, 3, 4, 5, 6, 7, 8, 9]
Extent: [0], Intent: [0]
Extent: [0, 7], Intent: [0, 7]
Extent: [0, 3], Intent: [0, 3]
Extent: [0, 3, 7], Intent: [0, 3, 7]
Extent: [0, 1, 7], Intent: [0, 1, 7]
Extent: [0, 1, 3, 7], Intent: [0, 1, 3, 7]
Extent: [0, 4], Intent: [0, 4]
Extent: [0, 4, 5, 7], Intent: [0, 4, 5, 7]
Extent: [0, 3, 4], Intent: [0, 3, 4]
Extent: [0, 3, 4, 5, 7], Intent: [0, 3, 4, 5, 7]
Extent: [0, 1, 4, 5, 7], Intent: [0, 1, 4, 5, 7]
Extent: [0, 1, 3, 4, 5, 7], Intent: [0, 1, 3, 4, 5, 7]
Extent: [0, 9], Intent: [0, 9]
Extent: [0, 7, 8], Intent: [0, 7, 8]
Extent: [0, 7, 8, 9], Intent: [0, 7, 8, 9]
Extent: [0, 3, 9], Intent: [0, 3, 9]
Extent: [0, 3, 7, 8], Intent: [0, 3, 7, 8]
Extent: [0, 2, 3, 7, 8, 9], Intent: [0, 2, 3, 7, 8, 9]
Extent: [0, 1, 7, 8, 9], Intent: [0, 1, 7, 8, 9]
Extent: [0, 1, 2, 3, 7, 8, 9], Intent: [0, 1, 2, 3, 7, 8, 9]
Extent: [0, 4, 6], Intent: [0, 4, 6]
Extent: [0, 4, 6, 9], Intent: [0, 4, 6, 9]
Extent: [0, 4, 5, 6, 7, 8], Intent: [0, 4, 5, 6, 7, 8]
Extent: [0, 4, 5, 6, 7, 8, 9], Intent: [0, 4, 5, 6, 7, 8, 9]
Extent: [0, 3, 4, 6], Intent: [0, 3, 4, 6]
Extent: [0, 3, 4, 6, 9], Intent: [0, 3, 4, 6, 9]
Extent: [0, 3, 4, 5, 6, 7, 8], Intent: [0, 3, 4, 5, 6, 7, 8]
Extent: [0, 2, 3, 4, 5, 6, 7, 8, 9], Intent: [0, 2, 3, 4, 5, 6, 7, 8, 9]
Extent: [0, 1, 4, 5, 6, 7, 8, 9], Intent: [0, 1, 4, 5, 6, 7, 8, 9]
Extent: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], Intent: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]