doc: Clarify doc comments for move_cursor_to and clear_last_lines.

Author: grunweg

src/term.rs

@@ -392,7 +392,7 @@ impl Term {
         terminal_size(self)
     }
 
-    /// Move the cursor to `x` and `y`
+    /// Move the cursor to row `x` and column `y`.
     #[inline]
     pub fn move_cursor_to(&self, x: usize, y: usize) -> io::Result<()> {
         move_cursor_to(self, x, y)
@@ -430,7 +430,7 @@ impl Term {
         clear_line(self)
     }
 
-    /// Clear the last `n` lines.
+    /// Clear the last `n` lines before the current line.
     ///
     /// This positions the cursor at the beginning of the first line
     /// that was cleared.