Rewrap all comments to 100 line width (#9490)

* reformat everything again

* manual formatting

* last manual fix

* Fix build

substrate/primitives/arithmetic/fuzzer/src/multiply_by_rational.rs

@@ -16,8 +16,8 @@
 // limitations under the License.
 
 //! # Running
-//! Running this fuzzer can be done with `cargo hfuzz run multiply_by_rational`. `honggfuzz` CLI options can
-//! be used by setting `HFUZZ_RUN_ARGS`, such as `-n 4` to use 4 threads.
+//! Running this fuzzer can be done with `cargo hfuzz run multiply_by_rational`. `honggfuzz` CLI
+//! options can be used by setting `HFUZZ_RUN_ARGS`, such as `-n 4` to use 4 threads.
 //!
 //! # Debugging a panic
 //! Once a panic is found, it can be debugged with

substrate/primitives/arithmetic/fuzzer/src/per_thing_rational.rs

@@ -16,8 +16,8 @@
 // limitations under the License.
 
 //! # Running
-//! Running this fuzzer can be done with `cargo hfuzz run per_thing_rational`. `honggfuzz` CLI options can
-//! be used by setting `HFUZZ_RUN_ARGS`, such as `-n 4` to use 4 threads.
+//! Running this fuzzer can be done with `cargo hfuzz run per_thing_rational`. `honggfuzz` CLI
+//! options can be used by setting `HFUZZ_RUN_ARGS`, such as `-n 4` to use 4 threads.
 //!
 //! # Debugging a panic
 //! Once a panic is found, it can be debugged with

substrate/primitives/arithmetic/src/helpers_128bit.rs

@@ -62,8 +62,8 @@ pub fn to_big_uint(x: u128) -> biguint::BigUint {
 
 /// Safely and accurately compute `a * b / c`. The approach is:
 ///   - Simply try `a * b / c`.
-///   - Else, convert them both into big numbers and re-try. `Err` is returned if the result
-///     cannot be safely casted back to u128.
+///   - Else, convert them both into big numbers and re-try. `Err` is returned if the result cannot
+///     be safely casted back to u128.
 ///
 /// Invariant: c must be greater than or equal to 1.
 pub fn multiply_by_rational(mut a: u128, mut b: u128, mut c: u128) -> Result<u128, &'static str> {