Update books

[rustbot]

rust-lang/book

2 commits in b2d1a0821e12a676b496d61891b8e3d374a8e832..e694be5991f1c5cf65c654ed610b4049e2389ed1
2025-07-17 23:32:15 UTC to 2025-07-14 21:23:38 UTC

• Chapter 19 from tech review (Chapter 19 from tech review book#4446)
• Chapter 18 from tech review (Chapter 18 from tech review book#4445)

rust-lang/reference

6 commits in 1f45bd41fa6c17b7c048ed6bfe5f168c4311206a..5b3ca00b50a5df475749aa2b66fafcd2c249cbe1
2025-07-25 13:51:40 UTC to 2025-07-14 19:49:01 UTC

• Fix and clarify CR LF normalization and CR in string literals (Fix and clarify CR LF normalization and CR in string literals reference#1944)
• glossary.md: tweak description of "dispatch" (glossary.md: tweak description of "dispatch" reference#1938)
• add missing id, r[asm.operand-type.supported-operands.const] (add missing id, r[asm.operand-type.supported-operands.const] reference#1939)
• &str and &[u8] have the same layout (&str and &[u8] have the same layout reference#1848)
• Rename and rewrite the "question mark operator" (Rename and rewrite the "question mark operator" reference#1931)
• Change "allocated object" to "allocation". (Change "allocated object" to "allocation". reference#1930)

[rustbot]

r? @ehuss

rustbot has assigned @ehuss.
They will have a look at your PR within the next two weeks and either review your PR or reassign to another reviewer.

Use r? to explicitly pick a reviewer

[rustbot]

⚠️ Warning ⚠️

• Some commits in this PR modify submodules.