Tweak comments in TermThemeRenderer::clear().

src/theme.rs

@@ -843,12 +843,12 @@ impl<'a> TermThemeRenderer<'a> {
     ///
     /// Position the cursor at the beginning of the current line.
     pub fn clear(&mut self) -> io::Result<()> {
-        // clear_last_lines only clears the lines preding the current one.
+        // clear the current line first, so the cursor ends at the beginning of the current line.
         self.term.clear_line()?;
         self.term
             .clear_last_lines(self.height + self.prompt_height)?;
-        // Technically, self.term now contains self.height + self.prompt_height empty lines after
-        // the current line. As these are empty, we don't really care, though.
+        // self.term now contains self.height + self.prompt_height empty lines after
+        // the current line. That doesn't really matter, as these are empty.
         self.height = 0;
         Ok(())
     }