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docs: make some tiny modification about spelling #32339

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Mar 22, 2016
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docs: make some tiny modification about spelling #32339

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8 changes: 4 additions & 4 deletions src/doc/book/primitive-types.md
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Expand Up @@ -7,7 +7,7 @@ of these ones, as well, but these are the most primitive.

# Booleans

Rust has a built in boolean type, named `bool`. It has two values, `true` and `false`:
Rust has a built-in boolean type, named `bool`. It has two values, `true` and `false`:

```rust
let x = true;
Expand Down Expand Up @@ -89,13 +89,13 @@ Unsigned types use a `u` for their category, and signed types use `i`. The `i`
is for ‘integer’. So `u8` is an eight-bit unsigned number, and `i8` is an
eight-bit signed number.

## Fixed size types
## Fixed-size types

Fixed size types have a specific number of bits in their representation. Valid
Fixed-size types have a specific number of bits in their representation. Valid
bit sizes are `8`, `16`, `32`, and `64`. So, `u32` is an unsigned, 32-bit integer,
and `i64` is a signed, 64-bit integer.

## Variable sized types
## Variable-size types

Rust also provides types whose size depends on the size of a pointer of the
underlying machine. These types have ‘size’ as the category, and come in signed
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