Update documentation

README.md

@@ -36,6 +36,6 @@ fn main() {
 }
 ```
 
-If no PAGER is found `setup()` does nothing and your executable keeps
+If no suitable pager found `setup()` does nothing and your executable keeps
 running as usual. `Pager` cleans after itself and doesn't leak resources in
 case of setup failure.

src/lib.rs

@@ -30,7 +30,7 @@
 //! }
 //! ```
 //!
-//! If no PAGER is found `setup()` does nothing and your executable keeps
+//! If no suitable pager found `setup()` does nothing and your executable keeps
 //! running as usual. `Pager` cleans after itself and doesn't leak resources in
 //! case of setup failure.
 //!