net/http:  correct capitalization in cancelTimeBody comment

Change-Id: I7acda22c01c5350ebf5ddabb1c12af96d368de5d
GitHub-Last-Rev: 3e5c022f8764d4abf91c964ceb4fc0e01ebd1352
GitHub-Pull-Request: golang/go#47160
Reviewed-on: https://go-review.googlesource.com/c/go/+/334229
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
diff --git a/src/net/http/client.go b/src/net/http/client.go
index e0cabc9..4d380c6 100644
--- a/src/net/http/client.go
+++ b/src/net/http/client.go
@@ -951,7 +951,7 @@
 }
 
 // cancelTimerBody is an io.ReadCloser that wraps rc with two features:
-// 1) on Read error or close, the stop func is called.
+// 1) On Read error or close, the stop func is called.
 // 2) On Read failure, if reqDidTimeout is true, the error is wrapped and
 //    marked as net.Error that hit its timeout.
 type cancelTimerBody struct {