reader.cpp: send carriage return after printing the window title

Terminals can get confused by all the non-printed characters about the
line position.

Closes #2453.

src/reader.cpp

@@ -952,6 +952,8 @@ void reader_write_title(const wcstring &cmd)
     }
     proc_pop_interactive();
     set_color(rgb_color_t::reset(), rgb_color_t::reset());
+    // Put the cursor back at the beginning of the line #2453
+    writestr(L"\r");
 }
 
 /**