docs: Fixed some code examples

Signed-off-by: Edgar Ramírez Mondragón <edgarrm358@gmail.com>

Author: edgarrmondragon

.pre-commit-config.yaml

@@ -53,11 +53,11 @@ repos:
         alias: ruff-format-docs
         args: ["--language", "python", "--no-pad-file", "--no-pad-groups", "--command", "ruff format", "docs/"]
         additional_dependencies:
-        - ruff==0.15.1
+        - ruff==0.15.2
     -   id: doccmd
         name: Ruff check fix docs
         language: python
         alias: ruff-check-fix-docs
         args: ["--language", "python", "--no-pad-file", "--no-pad-groups", "--command", "ruff check --fix", "docs/"]
         additional_dependencies:
-        - ruff==0.15.1
+        - ruff==0.15.2

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+### Documentation
+
+- Fixed some examples [#116](https://github.com/python-backoff/backoff/pull/116) (from [@edgarrmondragon](https://github.com/edgarrmondragon))
+
 ### Internal
 
 - Apply the Ruff `RET` rules [#92](https://github.com/python-backoff/backoff/pull/92) (from [@edgarrmondragon](https://github.com/edgarrmondragon))

docs/examples.md

@@ -100,10 +100,11 @@ def execute_transaction(session, operation):
     try:
         result = operation(session)
         session.commit()
-        return result
     except Exception:
         session.rollback()
         raise
+    else:
+        return result
 ```
 
 ## Async/Await
@@ -266,7 +267,7 @@ logger = logging.getLogger(__name__)
 
 def log_retry(details):
     logger.warning(
-        "Backing off %s:%.1fs after %d tries calling %s",
+        "Backing off %.1fs after %d tries calling %s",
         details["wait"],
         details["tries"],
         details["target"].__name__,
@@ -387,7 +388,7 @@ def check_circuit(e):
 )
 def protected_api_call(url):
     if not circuit_breaker.should_attempt():
-        raise Exception("Circuit breaker is open")
+        raise RuntimeError("Circuit breaker is open")
     return requests.get(url)
 ```