- " <p><b>x range: </b> <input type='text' width='5' id='x1' value='-10' />",
- " to <input type='text' width='5' id='x2' value='10' /></p>",
- " <p><button id='plot'>Plot</button></p>",
+ "<p><b>x range: </b> <input type='text' width='5' id='x1' value='-10' />",
+ "to <input type='text' width='5' id='x2' value='10' /></p>",
+ "<p><button id='plot'>Plot</button></p>",