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diff --git a/examples/diagnostics.cr b/examples/diagnostics.cr
index 3e1a86a..6266e54 100644
--- a/examples/diagnostics.cr
+++ b/examples/diagnostics.cr
@@ -7,8 +7,8 @@ $font : SF::Font
 $font = SF::Font.from_file("resources/font/Ubuntu-R.ttf")
 
 $window = SF::RenderWindow.new(
-  SF.video_mode(800, 600), "Diagnostic information",
-  settings: SF.context_settings(depth: 24, antialiasing: 8)

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print("Starting...")

import sys
import collections
import itertools
import subprocess

from PyQt5.QtWidgets import QApplication

app = QApplication(sys.argv)

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last_duration = last_return = 0
orig_append = __xonsh_history__.append

def append(cmd):
    nonlocal last_duration, last_return
    last_return = cmd['rtn']
    a, b = cmd['ts']
    last_duration = b - a
    orig_append(cmd)
__xonsh_history__.append = append

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require "spec"
require "power_assert"
require "json"


describe JSON::Any do
  describe "casts" do
    it "gets nil" do
      assert JSON.parse("null").as_nil == nil
    end

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FFFFF

Failures:

  1) JSON::Any gets float
     Failure/Error: assert JSON.parse("123.45").as_f32 == 123.45

           assert JSON.parse("123.45").as_f32 == 123.45
                       |               |      |
                       |               |      false : Bool

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set -e

cd /tmp
dd if=/dev/zero of=ceph_fs bs=1024 count=3145728 # 3 GiB
sudo losetup /dev/loop0 || sudo losetup /dev/loop0 ceph_fs
sudo mkfs.btrfs -f /dev/loop0
cd /path/to/ceph/src/
sudo mount /dev/loop0 dev
sudo mount /dev/loop0 run
sudo chown -R $USER: dev run

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last_duration = 0
_orig = __xonsh_history__.append

def _append(cmd):
    nonlocal last_duration
    last_duration = cmd['ts'][1] - cmd['ts'][0]
    _orig(cmd)

__xonsh_history__.append = _append

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def succ(s):
    a = list(s)
    for i in reversed(range(len(a))):
        a[i] = chr(ord(a[i]) + 1)
        if a[i] <= 'z':
            break
        a[i] = 'a'
    else:
        a.insert(0, 'a')
    return ''.join(a)

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require "compiler/crystal/syntax"


def transform_eval(source)
  ast = Crystal::Parser.parse(source)
  unless ast.is_a?(Crystal::Expressions)
    ast = Crystal::Expressions.new([ast])
  end
  exprs = (ast as Crystal::Expressions).expressions

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# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 355.11  (buildmeister@swio-display-x86-rhel47-07)  Wed Aug 26 17:14:39 PDT 2015

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 355.11  (buildmeister@swio-display-x86-rhel47-07)  Wed Aug 26 17:15:49 PDT 2015

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"