Typo in documentation: "an secure" → "a secure"

[aserghini]

There is a small typo in the documentation/code comments. The phrase "an secure HTTP request" should be "a secure HTTP request."

File: sdk/lib/_http/http.dart
Line number: 1677
Suggested Fix:

Change
/// When an secure HTTP request if made, using this HttpClient, and the
To
/// When a secure HTTP request if made, using this HttpClient, and the

[a-siva]

https://dart-review.googlesource.com/c/sdk/+/414340