doc refactor: tty

doc/api/tty.markdown

@@ -1,4 +1,4 @@
-## TTY
+# TTY
 
 Use `require('tty')` to access this module.
 
@@ -16,23 +16,23 @@ Example:
 
 
 
-### tty.isatty(fd)
+## tty.isatty(fd)
 
 Returns `true` or `false` depending on if the `fd` is associated with a
 terminal.
 
 
-### tty.setRawMode(mode)
+## tty.setRawMode(mode)
 
 `mode` should be `true` or `false`. This sets the properties of the current
 process's stdin fd to act either as a raw device or default.
 
 
-### tty.setWindowSize(fd, row, col)
+## tty.setWindowSize(fd, row, col)
 
 This function was removed in v0.6.0.
 
-### tty.getWindowSize(fd)
+## tty.getWindowSize(fd)
 
 This function was removed in v0.6.0. Use `process.stdout.getWindowSize()`
 instead.