Sidestep who provides output streams. Fixes #2933.

src/ch12-06-writing-to-stderr-instead-of-stdout.md

@@ -1,9 +1,9 @@
 ## Writing Error Messages to Standard Error Instead of Standard Output
 
 At the moment, we’re writing all of our output to the terminal using the
-`println!` macro. Most terminals provide two kinds of output: *standard
-output* (`stdout`) for general information and *standard error* (`stderr`)
-for error messages. This distinction enables users to choose to direct the
+`println!` macro. In most terminals, there are two kinds of output: *standard
+output* (`stdout`) for general information and *standard error* (`stderr`) for
+error messages. This distinction enables users to choose to direct the
 successful output of a program to a file but still print error messages to the
 screen.