prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  Regex case sensitive
  The regex match is currently case insensitive. It shouldn't be.
  
  https://github.com/opsdroid/opsdroid/blob/master/opsdroid/helper.py#L30
  
  
  </issue>
  <code>
  [start of opsdroid/helper.py]
  1 """Helper functions to use within OpsDroid."""
  2 
  3 import logging
  4 import re
  5 
  6 
  7 def set_logging_level(logging_level):
  8     """Set the logger level based on the user configuration."""
  9     logger = logging.getLogger()
  10     if logging_level == 'critical':
  11         logger.setLevel(logging.CRITICAL)
  12     elif logging_level == 'error':
  13         logger.setLevel(logging.ERROR)
  14     elif logging_level == 'warning':
  15         logger.setLevel(logging.WARNING)
  16     elif logging_level == 'info':
  17         logger.setLevel(logging.INFO)
  18     elif logging_level == 'debug':
  19         logger.setLevel(logging.DEBUG)
  20         # No need to log the others as they'll never be seen
  21         logging.debug("Set log level to debug")
  22     else:
  23         logger.setLevel(logging.INFO)
  24         logging.warning("Log level '" + logging_level +
  25                         "' unknown, defaulting to 'info'")
  26 
  27 
  28 def match(regex, message):
  29     """Regex match a string."""
  30     return re.match(regex, message, re.M | re.I)
  31
  [end of opsdroid/helper.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/opsdroid/helper.py b/opsdroid/helper.py
  --- a/opsdroid/helper.py
  +++ b/opsdroid/helper.py
  @@ -27,4 +27,4 @@
   
   def match(regex, message):
       """Regex match a string."""
  -    return re.match(regex, message, re.M | re.I)
  +    return re.match(regex, message)
  
verification_info: {"golden_diff": "diff --git a/opsdroid/helper.py b/opsdroid/helper.py\n--- a/opsdroid/helper.py\n+++ b/opsdroid/helper.py\n@@ -27,4 +27,4 @@\n \n def match(regex, message):\n     \"\"\"Regex match a string.\"\"\"\n-    return re.match(regex, message, re.M | re.I)\n+    return re.match(regex, message)\n", "issue": "Regex case sensitive\nThe regex match is currently case insensitive. It shouldn't be.\n\nhttps://github.com/opsdroid/opsdroid/blob/master/opsdroid/helper.py#L30\n\n", "before_files": [{"content": "\"\"\"Helper functions to use within OpsDroid.\"\"\"\n\nimport logging\nimport re\n\n\ndef set_logging_level(logging_level):\n    \"\"\"Set the logger level based on the user configuration.\"\"\"\n    logger = logging.getLogger()\n    if logging_level == 'critical':\n        logger.setLevel(logging.CRITICAL)\n    elif logging_level == 'error':\n        logger.setLevel(logging.ERROR)\n    elif logging_level == 'warning':\n        logger.setLevel(logging.WARNING)\n    elif logging_level == 'info':\n        logger.setLevel(logging.INFO)\n    elif logging_level == 'debug':\n        logger.setLevel(logging.DEBUG)\n        # No need to log the others as they'll never be seen\n        logging.debug(\"Set log level to debug\")\n    else:\n        logger.setLevel(logging.INFO)\n        logging.warning(\"Log level '\" + logging_level +\n                        \"' unknown, defaulting to 'info'\")\n\n\ndef match(regex, message):\n    \"\"\"Regex match a string.\"\"\"\n    return re.match(regex, message, re.M | re.I)\n", "path": "opsdroid/helper.py"}]}