Update README.md (#2808)

Minor grammatical fixes.

plugin/debug/README.md

@@ -6,11 +6,11 @@
 
 ## Description
 
-Normally CoreDNS will recover from panics, using *debug* inhibits this. The main use of *debug* is
-to help testing. A side effect of using *debug* is that `log.Debug` and `log.Debugf` will be printed
-to standard output.
+Normally CoreDNS will recover from panics; using *debug* inhibits this. The main use of *debug* is
+to help in testing. A side effect of using *debug* is that `log.Debug` and `log.Debugf` messages
+will be printed to standard output.
 
-Note that the *errors* plugin (if loaded) will also set a `recover` negating this setting.
+Note that the *errors* plugin (if loaded) will also set a `recover`, negating this setting.
 
 ## Syntax
 
@@ -18,7 +18,7 @@ Note that the *errors* plugin (if loaded) will also set a `recover` negating thi
 debug
 ~~~
 
-Some plugin will debug log DNS messages. This is done in the following format:
+Some plugins will send debug log DNS messages. This is done in the following format:
 
 ~~~
 debug: 000000 00 0a 01 00 00 01 00 00 00 00 00 01 07 65 78 61
@@ -27,11 +27,11 @@ debug: 000020 00 29 10 00 00 00 80 00 00 00
 debug: 00002a
 ~~~
 
-Using `text2pcap` (part of Wireshark) this can be converted back to binary, with the following
-command line: `text2pcap -i 17 -u 53,53`. Where 17 is the protocol (UDP) and 53 are the ports. These
-ports allow wireshark to detect these packets as DNS messages.
+Using `text2pcap` (part of Wireshark), this can be converted back to binary, with the following
+command line: `text2pcap -i 17 -u 53,53`, where 17 is the protocol (UDP) and 53 are the ports. These
+ports allow Wireshark to detect these packets as DNS messages.
 
-Each plugin can decide to dump messages to aid in debugging.
+Each plugin can decide whether to dump messages to aid in debugging.
 
 ## Examples