log/slog: package doc fixes

Fixes #62286

Change-Id: If463436e3b5ba6e4eb850097395e00482d0dc671
Reviewed-on: https://go-review.googlesource.com/c/go/+/523196
Reviewed-by: Jonathan Amsterdam <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
Run-TryBot: Sean Liao <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Auto-Submit: Dmitri Shuralyov <[email protected]>

Author: seankhliao

src/log/slog/doc.go

@@ -41,7 +41,7 @@ as a string and passes it to the [log] package.
 	2022/11/08 15:28:26 INFO hello count=3
 
 For more control over the output format, create a logger with a different handler.
-This statement uses [New] to create a new logger with a TextHandler
+This statement uses [New] to create a new logger with a [TextHandler]
 that writes structured records in text form to standard error:
 
 	logger := slog.New(slog.NewTextHandler(os.Stderr, nil))
@@ -210,7 +210,7 @@ The call
 
 is the most efficient way to achieve the same output as
 
-	slog.Info("hello", "count", 3)
+	slog.InfoContext(ctx, "hello", "count", 3)
 
 # Customizing a type's logging behavior
 
@@ -231,8 +231,8 @@ and line number of the logging call within the application. This can produce
 incorrect source information for functions that wrap slog. For instance, if you
 define this function in file mylog.go:
 
-	func Infof(format string, args ...any) {
-	    slog.Default().Info(fmt.Sprintf(format, args...))
+	func Infof(logger *slog.Logger, format string, args ...any) {
+	    logger.Info(fmt.Sprintf(format, args...))
 	}
 
 and you call it like this in main.go: