prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  `view.flows.add` command does not exist but the examples reference it
  #### Problem Description
  
  The `view.flows.add` command does not exist but the example `duplicate-modify-replay.py` shows this command being used.
  
  `replay.client` seems to perform both the "add to view" and "replay" function.
  
  </issue>
  <code>
  [start of examples/addons/duplicate-modify-replay.py]
  1 """Take incoming HTTP requests and replay them with modified parameters."""
  2 from mitmproxy import ctx
  3 
  4 
  5 def request(flow):
  6     # Avoid an infinite loop by not replaying already replayed requests
  7     if flow.is_replay == "request":
  8         return
  9     flow = flow.copy()
  10     # Only interactive tools have a view. If we have one, add a duplicate entry
  11     # for our flow.
  12     if "view" in ctx.master.addons:
  13         ctx.master.commands.call("view.flows.add", [flow])
  14     flow.request.path = "/changed"
  15     ctx.master.commands.call("replay.client", [flow])
  16
  [end of examples/addons/duplicate-modify-replay.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/examples/addons/duplicate-modify-replay.py b/examples/addons/duplicate-modify-replay.py
  --- a/examples/addons/duplicate-modify-replay.py
  +++ b/examples/addons/duplicate-modify-replay.py
  @@ -10,6 +10,6 @@
       # Only interactive tools have a view. If we have one, add a duplicate entry
       # for our flow.
       if "view" in ctx.master.addons:
  -        ctx.master.commands.call("view.flows.add", [flow])
  +        ctx.master.commands.call("view.flows.duplicate", [flow])
       flow.request.path = "/changed"
       ctx.master.commands.call("replay.client", [flow])
  
verification_info: {"golden_diff": "diff --git a/examples/addons/duplicate-modify-replay.py b/examples/addons/duplicate-modify-replay.py\n--- a/examples/addons/duplicate-modify-replay.py\n+++ b/examples/addons/duplicate-modify-replay.py\n@@ -10,6 +10,6 @@\n     # Only interactive tools have a view. If we have one, add a duplicate entry\n     # for our flow.\n     if \"view\" in ctx.master.addons:\n-        ctx.master.commands.call(\"view.flows.add\", [flow])\n+        ctx.master.commands.call(\"view.flows.duplicate\", [flow])\n     flow.request.path = \"/changed\"\n     ctx.master.commands.call(\"replay.client\", [flow])\n", "issue": "`view.flows.add` command does not exist but the examples reference it\n#### Problem Description\r\n\r\nThe `view.flows.add` command does not exist but the example `duplicate-modify-replay.py` shows this command being used.\r\n\r\n`replay.client` seems to perform both the \"add to view\" and \"replay\" function.\n", "before_files": [{"content": "\"\"\"Take incoming HTTP requests and replay them with modified parameters.\"\"\"\nfrom mitmproxy import ctx\n\n\ndef request(flow):\n    # Avoid an infinite loop by not replaying already replayed requests\n    if flow.is_replay == \"request\":\n        return\n    flow = flow.copy()\n    # Only interactive tools have a view. If we have one, add a duplicate entry\n    # for our flow.\n    if \"view\" in ctx.master.addons:\n        ctx.master.commands.call(\"view.flows.add\", [flow])\n    flow.request.path = \"/changed\"\n    ctx.master.commands.call(\"replay.client\", [flow])\n", "path": "examples/addons/duplicate-modify-replay.py"}]}