Consistently default to stderr. Fixes console-rs#38

Author: mitsuhiko

src/lib.rs

@@ -38,7 +38,7 @@
 //!
 //! <img src="https://github.com/mitsuhiko/indicatif/raw/master/screenshots/yarn.gif?raw=true" width="60%">
 //!
-//! Progress bars are manually advanced and by default draw to stdout.
+//! Progress bars are manually advanced and by default draw to stderr.
 //! When you are done, the progress bar can be finished either visibly
 //! (eg: the progress bar stays on the screen) or cleared (the progress
 //! bar will be removed).

src/progress.rs

@@ -423,7 +423,7 @@ impl ProgressState {
         if let Some(width) = self.width {
             width as usize
         } else {
-            Term::stdout().size().1 as usize
+            Term::stderr().size().1 as usize
         }
     }
 
@@ -496,7 +496,7 @@ impl ProgressBar {
 
     /// Creates a new spinner.
     ///
-    /// This spinner by default draws directly to stdout.  This adds the
+    /// This spinner by default draws directly to stderr  This adds the
     /// default spinner style to it.
     pub fn new_spinner() -> ProgressBar {
         let rv = ProgressBar::new(!0);