Apply suggestions from code review

Author: nlf

docs/content/commands/npm-run-script.md

@@ -32,7 +32,7 @@ npm run test -- --grep="pattern"
 ```
 
 The arguments will only be passed to the script specified after ```npm run```
-and not to any `pre` or `post script.
+and not to any `pre` or `post` script.
 
 The `env` script is a special built-in command that can be used to list
 environment variables that will be available to the script at runtime. If an
@@ -56,7 +56,7 @@ instead of
 ```
 
 The actual shell your script is run within is platform dependent. By default,
-on Unix-like systems it is the `/bin/sh` command, on Windows it is the
+on Unix-like systems it is the `/bin/sh` command, on Windows it is
 `cmd.exe`.
 The actual shell referred to by `/bin/sh` also depends on the system.
 You can customize the shell with the `script-shell` configuration.
@@ -102,7 +102,7 @@ Skips running `pre` and `post` scripts.
 * Default: `null`
 
 Optional custom script to use to execute the command. If not defined defaults
-to `/bin/sh` on Unix, defaults to `env.comspec` or `cmd` on Windows.
+to `/bin/sh` on Unix, defaults to `env.comspec` or `cmd.exe` on Windows.
 
 #### silent