[book] HTML output can render an entity within a code example, but LaTeX

can't. Also, Pod parsers other than Pod::Simple can't parse entities in
code examples. Removing it, since it's not really necessary to use the
symbol for 'pi' in a code example comment. See TT #556.


git-svn-id: https://svn.parrot.org/parrot/trunk@38220 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

docs/book/ch09_pasm.pod

@@ -255,7 +255,7 @@ opcode:
 =begin PASM
 
   set I0, 42        # set integer register #0 to the integer value 42
-  set N3, 3.14159   # set number register #3 to an approximation of E<#x3C0>
+  set N3, 3.14159   # set number register #3 to an approximation of pi
   set I1, I0        # set register I1 to what I0 contains
   set I2, N3        # truncate the floating point number to an integer