Improve speaker notes

Dependencies

• [2] UXLO2KVD Introduce fragments
• [3] 4AZS4L6B Add chapters
• [4] CBUCBYTV Progress
• [5] NYFLNSVV Add some contents
• [6] WYULWETJ Reorganize
• [7] D7QXCWGA Progress
• [8] SQWPGFUE Finish the demos
• [*] ARAFRHKU Create the outline of the talk

Change contents

• replacement in sections/4-four-new-kids-on-the-block.md at line 3
  [3.7971521]→[3.7249:7282](∅→∅)
  − # Four New(er) Kids On The Block
  [3.7971521]

  [3.7971545]
  + # Three New(er) Kids On The Block
• replacement in sections/5-fossil.md at line 126
  [3.995]→[3.995:1052](∅→∅)
  − Because Fossil repositories are stored in a single file.
  [3.995]

  [3.1052]
  + The problem occurs because Fossil puts every revision into a single file, and when you have a ton of files to pack into a single file, it exceeds the computer memory. So maybe Fossil's garbage collect is not yet as sophisticated as the one currently present in Git.
• replacement in sections/6-pijul.md at line 82
  [3.1330]→[2.6349:6529](∅→∅)
  − `pijul init demo`

  − `touch Sample.java`

  − `pijul status`

  − `pijul add Sample.java`

  − `mkdir directory`

  − `pijul add directory`

  − `pijul status`

  − `pijul record `
  [3.1330]

  [3.1494]
  + pijul init demo

  + touch Sample.java

  + pijul status

  + pijul add Sample.java

  + mkdir directory

  + pijul add directory

  + pijul status

  + pijul record
• replacement in sections/6-pijul.md at line 91
  [3.1495]→[2.6530:6806](∅→∅)
  − (Here `y` means yes, `n` means no, `k` means undo and remake last decision, `a` means include this and all remaining patches, `d` means include neither this patch nor the remaining patches and `i` means ignore this file locally (i.e. it is added to .pijul/local/ignore).)
  [3.1495]

  [3.1759]
  + (Here `y` means yes, `n` means no, `k` means undo and remake last decision, `a` means include this and all remaining patches, `d` means include neither this patch nor the remaining patches and `i` means ignore this file locally (i.e. it is added to .pijul/local/ignore).)
• replacement in sections/6-pijul.md at line 95
  [3.1791]→[3.53976:54006](∅→∅)
  − !!! Roll the die on stage !!!
  [3.1791]

  [3.1823]
  + **!!! Roll the die on stage !!!**
• edit in sections/6-pijul.md at line 98
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  −
• edit in sections/6-pijul.md at line 101
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• edit in sections/6-pijul.md at line 109
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• edit in sections/6-pijul.md at line 112
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• edit in sections/6-pijul.md at line 114
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• edit in sections/6-pijul.md at line 117
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  −