Python 3 vs. @code{Python} 3 in python.texi

[Yao Qi]

Hi Eli,
Which one do we use in sentence "In XXX, the return
value is a @code{memoryview} object.", "Python 3" or
"@code{Python} 3"?
https://sourceware.org/ml/gdb-patches/2017-03/msg00039.html

We use "@code{Python} 3" for Inferior.read_memory,
....
@code{Inferior.write_memory} function.  In @code{Python} 3, the return
value is a @code{memoryview} object.

so I suggested that we need to use "@code{Python} 3" for
consistency, but Tim believes "Python 3" should be used,
because "@code{python} is used when the actual "python" command
in GDB is meant, not the name of the language per-se."

-- 
Yao (齐尧)