Small doc fixes

src/async.rs

@@ -9,7 +9,7 @@ use std::thread;
 /// be buffered in a mpsc queue, which will eventually be read by the current thread.
 ///
 /// Note that this will acquire the Mutex lock on the standard input, making all future stdin
-/// construction hang the program.
+/// construction hang the program until the reader is dropped.
 pub fn async_stdin() -> AsyncReader {
     let (send, recv) = mpsc::channel();
 

src/color.rs

@@ -35,7 +35,7 @@ pub enum Color {
     LightWhite,
     /// 216-color (r, g, b ≤ 5) RGB.
     Rgb(u8, u8, u8),
-    /// Grayscale (max value: 24)
+    /// Grayscale (max value: 24).
     Grayscale(u8),
 }
 

src/control.rs

@@ -93,7 +93,7 @@ pub trait TermWrite {
             b'm',
         ])
     }
-    /// Set foreground color
+    /// Set foreground color.
     fn color(&mut self, color: Color) -> io::Result<usize> {
         let ansi = color.to_ansi_val();
         self.csi(&[
@@ -108,7 +108,7 @@ pub trait TermWrite {
             b'm',
         ])
     }
-    /// Set background color
+    /// Set background color.
     fn bg_color(&mut self, color: Color) -> io::Result<usize> {
         let ansi = color.to_ansi_val();
         self.csi(&[