In tutorial/inputoutput.html:
"This also greater control over how the value is formatted. The 
following example truncates the Pi to three places after the decimal."

Should be:
"This allows greater control over how the value is formatted. The 
following example truncates pi to three places after the decimal."

Next subsection:
"However, because this old style of formatting will eventually removed 
from the language str.format() should generally be used."

Should be:
"However, because this old style of formatting will eventually be 
removed from the language, str.format() should generally be used."