fix: Dont' scroll after writing last row.

kilo.c

@@ -101,10 +101,11 @@ int getWindowSize(int *rows, int *cols) {
 
     if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0) {
         // Fallback if ioctl can't query size:
-        // Move cursor to the bottom right, then query its position.
+        // Move cursor to the bottom right;
         if (write(STDOUT_FILENO, "\x1b[999C\x1b[999B", 12) != 12) {
             return -1;
         }
+        // then query its position.
         return getCursorPosition(rows, cols);
     }
 
@@ -117,7 +118,12 @@ int getWindowSize(int *rows, int *cols) {
 
 void editorDrawRows() {
     for (int y = 0; y < E.screenrows; y++) {
-        write(STDOUT_FILENO, "~\r\n", 3);
+        write(STDOUT_FILENO, "~", 1);
+
+        // Don't scroll on the last line.
+        if (y < E.screenrows - 1) {
+            write(STDOUT_FILENO, "\r\n", 2);
+        }
     }
 }