prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  Fix vega-embed version for Altair 1
  For example in https://github.com/altair-viz/altair/blob/d4d29ca06e920f71073766c6456d387e682cee17/altair/vegalite/v1/html.py#L7
  
  </issue>
  <code>
  [start of altair/vegalite/v1/html.py]
  1 HTML_TEMPLATE = """
  2 <!DOCTYPE html>
  3 <html>
  4 <head>
  5   <script src="https://cdn.jsdelivr.net/npm/vega@2"></script>
  6   <script src="https://cdn.jsdelivr.net/npm/vega-lite@1"></script>
  7   <script src="https://cdn.jsdelivr.net/npm/vega-embed@3"></script>
  8 </head>
  9 <body>
  10   <div id="vis"></div>
  11   <script type="text/javascript">
  12     var spec = {spec};
  13     var opt = {opt};
  14     vegaEmbed("#vis", spec, opt);
  15   </script>
  16 </body>
  17 </html>
  18 """
  19
  [end of altair/vegalite/v1/html.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/altair/vegalite/v1/html.py b/altair/vegalite/v1/html.py
  --- a/altair/vegalite/v1/html.py
  +++ b/altair/vegalite/v1/html.py
  @@ -4,7 +4,7 @@
   <head>
     <script src="https://cdn.jsdelivr.net/npm/vega@2"></script>
     <script src="https://cdn.jsdelivr.net/npm/vega-lite@1"></script>
  -  <script src="https://cdn.jsdelivr.net/npm/vega-embed@3"></script>
  +  <script src="https://cdn.jsdelivr.net/npm/vega-embed@2"></script>
   </head>
   <body>
     <div id="vis"></div>
  
verification_info: {"golden_diff": "diff --git a/altair/vegalite/v1/html.py b/altair/vegalite/v1/html.py\n--- a/altair/vegalite/v1/html.py\n+++ b/altair/vegalite/v1/html.py\n@@ -4,7 +4,7 @@\n <head>\n   <script src=\"https://cdn.jsdelivr.net/npm/vega@2\"></script>\n   <script src=\"https://cdn.jsdelivr.net/npm/vega-lite@1\"></script>\n-  <script src=\"https://cdn.jsdelivr.net/npm/vega-embed@3\"></script>\n+  <script src=\"https://cdn.jsdelivr.net/npm/vega-embed@2\"></script>\n </head>\n <body>\n   <div id=\"vis\"></div>\n", "issue": "Fix vega-embed version for Altair 1\nFor example in https://github.com/altair-viz/altair/blob/d4d29ca06e920f71073766c6456d387e682cee17/altair/vegalite/v1/html.py#L7\n", "before_files": [{"content": "HTML_TEMPLATE = \"\"\"\n<!DOCTYPE html>\n<html>\n<head>\n  <script src=\"https://cdn.jsdelivr.net/npm/vega@2\"></script>\n  <script src=\"https://cdn.jsdelivr.net/npm/vega-lite@1\"></script>\n  <script src=\"https://cdn.jsdelivr.net/npm/vega-embed@3\"></script>\n</head>\n<body>\n  <div id=\"vis\"></div>\n  <script type=\"text/javascript\">\n    var spec = {spec};\n    var opt = {opt};\n    vegaEmbed(\"#vis\", spec, opt);\n  </script>\n</body>\n</html>\n\"\"\"\n", "path": "altair/vegalite/v1/html.py"}]}