Fix multiple documentation issues concerned by clippy

framework/aster-frame/src/mm/page_table/node.rs

@@ -15,6 +15,7 @@
 //!    - a parent page table node,
 //!    - or a handle to a page table node,
 //!    - or a processor.
+//!
 //! This is implemented by using a reference counter in the frame metadata. If the above
 //! conditions are not met, the page table node is ensured to be freed upon dropping the last
 //! reference.

framework/libs/ktest/src/lib.rs

@@ -12,7 +12,8 @@
 //! By all means, ktest is an individule crate that only requires:
 //!  - a custom linker script section `.ktest_array`,
 //!  - and an alloc implementation.
-//! to work. And the frame happens to provide both of them. Thus, any crates depending
+//!
+//! And the frame happens to provide both of them. Thus, any crates depending
 //! on the frame can use ktest without any extra dependency.
 //!
 //! ## Usage

framework/libs/linux-bzimage/setup/src/x86/amd64_efi/paging.rs

@@ -8,6 +8,7 @@
 //!  - Level-3: Page Directory Pointer Table (PDPT);
 //!  - Level-2: Page Directory (PD);
 //!  - Level-1: Page Table (PT).
+//!
 //! We sometimes use "level-n" page table to refer to the page table described
 //! above, avoiding the use of complicated names in the Intel manual.
 

kernel/aster-nix/src/process/process_vm/init_stack/aux_vec.rs

@@ -11,9 +11,9 @@ use crate::prelude::*;
 /// Here is a concise description of Auxiliary Vector from GNU's manual:
 ///
 ///  > When a program is executed, it receives information from the operating system
-/// about the environment in which it is operating. The form of this information
-/// is a table of key-value pairs, where the keys are from the set of ‘AT_’
-/// values in elf.h.
+///  > about the environment in which it is operating. The form of this information
+///  > is a table of key-value pairs, where the keys are from the set of ‘AT_’
+///  > values in elf.h.
 
 #[allow(non_camel_case_types)]
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord)]

kernel/libs/comp-sys/component-macro/src/lib.rs

@@ -1,7 +1,6 @@
 // SPDX-License-Identifier: MPL-2.0
 
 //！This crate defines the component system related macros.
-//!
 
 #![feature(proc_macro_diagnostic)]
 #![allow(dead_code)]