doc: improve usage of zero/0

PR-URL: #7466
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Bryan English <bryan@bryanenglish.com>
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: Trott

doc/api/http.md

@@ -699,7 +699,7 @@ added: v0.1.90
 Begin accepting connections on the specified `port` and `hostname`. If the
 `hostname` is omitted, the server will accept connections on any IPv6 address
 (`::`) when IPv6 is available, or any IPv4 address (`0.0.0.0`) otherwise. Use a
-port value of zero to have the operating system assign an available port.
+port value of `0` to have the operating system assign an available port.
 
 To listen to a unix socket, supply a filename instead of port and hostname.
 

doc/api/process.md

@@ -183,7 +183,7 @@ code without properly recovering from the exception can cause additional
 unforeseen and unpredictable issues.
 
 Exceptions thrown from within the event handler will not be caught. Instead the
-process will exit with a nonzero exit code and the stack trace will be printed.
+process will exit with a non-zero exit code and the stack trace will be printed.
 This is to avoid infinite recursion.
 
 Attempting to resume normally after an uncaught exception can be similar to