doc: fix e.g., to e.g. in doc/http.md

fix e.g., to e.g. in doc/http.md

Fixes: https://github.com/nodejs/code-and-learn/issues/58
PR-URL: https://github.com/nodejs/node/pull/9564
Reviewed-By: Yosuke Furukawa <yosuke.furukawa@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Shigeki Ohtsu <ohtsu@ohtsu.org>

doc/api/http.md

@@ -510,7 +510,7 @@ with a 100 Continue as appropriate.
 
 Handling this event involves calling [`response.writeContinue()`][] if the client
 should continue to send the request body, or generating an appropriate HTTP
-response (e.g., 400 Bad Request) if the client should not continue to send the
+response (e.g. 400 Bad Request) if the client should not continue to send the
 request body.
 
 Note that when this event is emitted and handled, the `'request'` event will
@@ -755,7 +755,7 @@ This method adds HTTP trailing headers (a header but at the end of the
 message) to the response.
 
 Trailers will **only** be emitted if chunked encoding is used for the
-response; if it is not (e.g., if the request was HTTP/1.0), they will
+response; if it is not (e.g. if the request was HTTP/1.0), they will
 be silently discarded.
 
 Note that HTTP requires the `Trailer` header to be sent if you intend to