Update Codecov action version and improve error message

.github/workflows/test.yml

@@ -17,7 +17,6 @@ jobs:
         run: make setup-test-unit
       - run: . venv/bin/activate && make test
 
-      - name: Upload Coverage to Codecov
-        uses: codecov/codecov-action@v4
-        env:
-          token: ${{ secrets.CODECOV_TOKEN }}
+      - name: Upload Coverage
+        uses: codecov/codecov-action@v3
+        token: ${{ secrets.CODECOV_TOKEN }}

README.md

@@ -279,14 +279,14 @@ with add_context('reloading plugins'):
     with add_context('loading config'):
         raise RuntimeError('file is missing')
 ```
-This will produce an error message:
+This will produce an error with the following message:
 ```
 reloading plugins: loading config: file is missing
 ```
 
-Note that each individual message part doesn't describe the error well,
-but combined, the whole message is very informative.
-That's the main idea behind wrapping errors with context.
+Note that while each individual part of the message may not provide a comprehensive explanation of the error,
+when combined, the whole message becomes highly informative.
+This is the core principle behind enriching errors with context.
 
 
 # Shell Utilities

docs/sublog.md

@@ -54,11 +54,11 @@ with add_context('reloading plugins'):
     with add_context('loading config'):
         raise RuntimeError('file is missing')
 ```
-This will produce an error message:
+This will produce an error with the following message:
 ```
 reloading plugins: loading config: file is missing
 ```
 
-Note that each individual message part doesn't describe the error well,
-but combined, the whole message is very informative.
-That's the main idea behind wrapping errors with context.
+Note that while each individual part of the message may not provide a comprehensive explanation of the error,
+when combined, the whole message becomes highly informative.
+This is the core principle behind enriching errors with context.