Rollup merge of #155467 - DanielEScherzer:patch-2, r=mejrs

`std::error::Request`: clean up documentation

Author: jhpratt

library/core/src/error.rs

@@ -494,37 +494,37 @@ where
 /// `Request` supports generic, type-driven access to data. Its use is currently restricted to the
 /// standard library in cases where trait authors wish to allow trait implementors to share generic
 /// information across trait boundaries. The motivating and prototypical use case is
-/// `core::error::Error` which would otherwise require a method per concrete type (eg.
+/// `core::error::Error` which would otherwise require a method per concrete type (e.g.
 /// `std::backtrace::Backtrace` instance that implementors want to expose to users).
 ///
 /// # Data flow
 ///
 /// To describe the intended data flow for Request objects, let's consider two conceptual users
 /// separated by API boundaries:
 ///
-/// * Consumer - the consumer requests objects using a Request instance; eg a crate that offers
+/// * Consumer - the consumer requests objects using a Request instance; e.g. a crate that offers
 ///   fancy `Error`/`Result` reporting to users wants to request a Backtrace from a given `dyn Error`.
 ///
-/// * Producer - the producer provides objects when requested via Request; eg. a library with an
+/// * Producer - the producer provides objects when requested via Request; e.g. a library with an
 ///   an `Error` implementation that automatically captures backtraces at the time instances are
 ///   created.
 ///
-/// The consumer only needs to know where to submit their request and are expected to handle the
+/// The consumer only needs to know where to submit their request and is expected to handle the
 /// request not being fulfilled by the use of `Option<T>` in the responses offered by the producer.
 ///
 /// * A Producer initializes the value of one of its fields of a specific type. (or is otherwise
-///   prepared to generate a value requested). eg, `backtrace::Backtrace` or
-///   `std::backtrace::Backtrace`
+///   prepared to generate a value requested). e.g., `backtrace::Backtrace` or
+///   `std::backtrace::Backtrace`.
 /// * A Consumer requests an object of a specific type (say `std::backtrace::Backtrace`). In the
 ///   case of a `dyn Error` trait object (the Producer), there are functions called `request_ref` and
 ///   `request_value` to simplify obtaining an `Option<T>` for a given type.
 /// * The Producer, when requested, populates the given Request object which is given as a mutable
 ///   reference.
 /// * The Consumer extracts a value or reference to the requested type from the `Request` object
-///   wrapped in an `Option<T>`; in the case of `dyn Error` the aforementioned `request_ref` and `
-///   request_value` methods mean that `dyn Error` users don't have to deal with the `Request` type at
+///   wrapped in an `Option<T>`; in the case of `dyn Error` the aforementioned `request_ref` and
+///   `request_value` methods mean that `dyn Error` users don't have to deal with the `Request` type at
 ///   all (but `Error` implementors do). The `None` case of the `Option` suggests only that the
-///   Producer cannot currently offer an instance of the requested type, not it can't or never will.
+///   Producer cannot currently offer an instance of the requested type, not that it can't or never will.
 ///
 /// # Examples
 ///