html type="submit" doesn't work -

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i following tutorial, , have simple code

<form>  <input name=“q”>  <input type=“submit”> </form>

, should show button, appears text box. weird thing is, copy paste same text textedit(cover original ), , works fine button. however, when try delete letter( such t in sumbit) , retype it, won't work again.

don't use smart quotes when writing html. won't interpreted correctly goes default input type of of text.

change 

<input name=“q”> <input type=“submit”>

to

<input name="q"> <input type="submit">

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