Update docs/language/operators/debug.md

Co-authored-by: Phil Rzewski <[email protected]>

docs/language/operators/debug.md

@@ -9,13 +9,13 @@ debug [ <expr> ]
 ```
 ### Description
 
-The `debug` operator write the value of `expr` to the debug channel. If no
-`expr` is provided `this` is written to the debug channel. If the query is
-ran on command line via `zq` or `zed` all output written to the debug
+The `debug` operator writes the value of `expr` to the debug channel. If no
+`expr` is provided, `this` is written to the debug channel. If the query is
+run on the command line via `zq` or `zed` all output written to the debug
 channel is displayed on stderr.
 
-The `debug` operator is useful to view intermediate values as part of
-workflow when debugging complex zed query.
+The `debug` operator is useful to view intermediate values when debugging a
+complex Zed query.
 
 ### Examples