Error -> Defect for defects (#13908)

* Error -> Defect for defects

The distinction between Error and Defect is subjective,
context-dependent and somewhat arbitrary, so when looking at an
exception, it's hard to guess what it is - this happens often when
looking at a `raises` list _without_ opening the corresponding
definition and digging through layers of inheritance.

With the help of a little consistency in naming, it's at least possible
to start disentangling the two error types and the standard lib can set
a good example here.

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/niminaction/Chapter3/various3.nim b/tests/niminaction/Chapter3/various3.nim
index 711740da8..849ea71d8 100644
--- a/tests/niminaction/Chapter3/various3.nim
+++ b/tests/niminaction/Chapter3/various3.nim
@@ -22,7 +22,7 @@ block:
   assert obj.contents == "Hello"
 
   var obj2 = Box(empty: true)
-  doAssertRaises(FieldError):
+  doAssertRaises(FieldDefect):
     echo(obj2.contents)
 
 import json