Improve examples for working with the context API.
diff --git a/Doc/lib/libdecimal.tex b/Doc/lib/libdecimal.tex
index 562aae6..cf21b8d 100644
--- a/Doc/lib/libdecimal.tex
+++ b/Doc/lib/libdecimal.tex
@@ -179,7 +179,7 @@
'1.34'
>>> float(a)
1.3400000000000001
->>> round(a, 1)
+>>> round(a, 1) # round() first converts to binary floating point
1.3
>>> int(a)
1
@@ -217,9 +217,6 @@
\begin{verbatim}
>>> myothercontext = Context(prec=60, rounding=ROUND_HALF_DOWN)
->>> myothercontext
-Context(prec=60, rounding=ROUND_HALF_DOWN, Emin=-999999999, Emax=999999999,
- capitals=1, flags=[], traps=[])
>>> setcontext(myothercontext)
>>> Decimal(1) / Decimal(7)
Decimal("0.142857142857142857142857142857142857142857142857142857142857")
@@ -855,10 +852,13 @@
\begin{verbatim}
# Set applicationwide defaults for all threads about to be launched
-DefaultContext = Context(prec=12, rounding=ROUND_DOWN, traps=[InvalidOperation])
+DefaultContext.prec = 12
+DefaultContext.rounding = ROUND_DOWN
+DefaultContext.traps = ExtendedContext.traps.copy()
+DefaultContext.traps[InvalidOperation] = 1
setcontext(DefaultContext)
-# Afterward, the threads can be started
+# Afterwards, the threads can be started
t1.start()
t2.start()
t3.start()