Fix misleading echo in swift-fmt-check target (#585)

Small documentation and Makefile fixes:

- Makefile: swift-fmt-check echo says "Applying" but the target only
checks/lints — changed to "Checking code formatting compliance"
- README.md: "libraries surface" → "libraries' API surface"
- README.md: "light weight" → "lightweight" (consistent with rest of
doc)
- README.md: "for use a default" → missing comma, grammar fix
- CONTRIBUTING.md: "To clarify of what" → "To clarify what"

Author: splint-disk-8i

CONTRIBUTING.md

@@ -113,4 +113,4 @@ AI tools should be used to **enhance, not replace** the human elements that make
 
 ## Code of conduct
 
-To clarify of what is expected of our contributors and community members, the Containerization team has adopted the code of conduct defined by the Contributor Covenant. This document is used across many open source communities and articulates our values well. For more detail, please read the [Code of Conduct](https://github.com/apple/.github/blob/main/CODE_OF_CONDUCT.md "Code of Conduct").
+To clarify what is expected of our contributors and community members, the Containerization team has adopted the code of conduct defined by the Contributor Covenant. This document is used across many open source communities and articulates our values well. For more detail, please read the [Code of Conduct](https://github.com/apple/.github/blob/main/CODE_OF_CONDUCT.md "Code of Conduct").

Makefile

@@ -139,7 +139,7 @@ swift-fmt:
 	@$(SWIFT) format --recursive --configuration .swift-format -i $(SWIFT_SRC)
 
 swift-fmt-check:
-	   @echo Applying the standard code formatting...
+	   @echo Checking code formatting compliance...
 	   @$(SWIFT) format lint --recursive --strict --configuration .swift-format-nolint $(SWIFT_SRC)
 
 .PHONY: update-licenses

README.md

@@ -40,7 +40,7 @@ Older versions of macOS are not supported.
 
 ## Example Usage
 
-For examples of how to use some of the libraries surface, the cctl executable is a good start. This app is a useful playground for exploring the API. It contains commands that exercise some of the core functionality of the various products, such as:
+For examples of how to use the libraries' API surface, the cctl executable is a good start. This app is a useful playground for exploring the API. It contains commands that exercise some of the core functionality of the various products, such as:
 
 1. [Manipulating OCI images](./Sources/cctl/ImageCommand.swift)
 2. [Logging in to container registries](./Sources/cctl/LoginCommand.swift)
@@ -54,7 +54,7 @@ Containerization provides an optimized kernel configuration located in the [kern
 
 This directory includes a containerized build environment to easily compile a kernel for use with Containerization.
 
-The kernel configuration is a minimal set of features to support fast start times and a light weight environment.
+The kernel configuration is a minimal set of features to support fast start times and a lightweight environment.
 
 While this configuration will work for the majority of workloads we understand that some will need extra features.
 To solve this Containerization provides first class APIs to use different kernel configurations and versions on a per container basis.
@@ -124,7 +124,7 @@ make test integration
 ```
 
 A kernel is required to run integration tests.
-If you do not have a kernel locally for use a default kernel can be fetched using the `make fetch-default-kernel` target.
+If you do not have a kernel locally, a default kernel can be fetched using the `make fetch-default-kernel` target.
 
 Fetching the default kernel only needs to happen after an initial build or after a `make clean`.