metaprogramming

### Example
let unreachableProxy = "http://127.0.0.1:8888"
try:
  let client = newHttpClient(proxy=newProxy(unreachableProxy), timeout=1)
  var res = client.getContent("https://github.com")
  echo res
except:
  echo "Timed out"

Current Output

timeout variable is ignored, program stuck until default socket timeout will happen

Expected Output

Timed out a

Python 3.x uses _call_with_frames_removed to remove internal frames from tracebacks. I tried it in #1687, but couldn't get it to work; might be due to this Python issue.
Regardless, it would be good to remove those frames somehow.

Justification
It's much more common to see the code below:

Public Sub Foo()
    Dim i, j, k As Long
    'code
End Sub

than it is to see:

Public Sub Foo()
    Dim i As Long, j As Long, k As Long
    'code
End Sub

This is a very common pitfall. Example code in a MultipleDeclarations inspect

A lot of the Javadoc comments int the public API are missing documentation for things like parameters and return types (think @param and @return tags). In my opinion, the most glaring omissions of these details are in the metamodel docs, found in the subpackages of spoon.reflect.

For example, at the time of writing