Works for the small dataset, and I have moved to a live example, in which some of the methods already have headers and we want to leave them alone.

Input snippet:

        /// <summary>
        /// Checks to see if the data on the clipboard supports
        /// the given data type.
        /// </summary>
        /// <param name="dataType">The data type to check for.</param>
        /// <returns><c>true</c> if the data type is present.</returns
+>
        public bool ClipboardDataHasType(string dataType)
        {
            return dataType == m_dataType;
        }

        /// <summary>
        /// Gets the clipboard data.
        /// </summary>
        /// <param name="dataType">Type of the data.</param>
        /// <returns>
        /// The data on the clipboard matching the datatype
        /// </returns>
        public object GetClipboardData(string dataType)
[download]

gets turned into output snippet:

        /// <summary>
        /// Checks to see if the data on the clipboard supports
        /// the given data type.
        /// </summary>
        /// <param name="dataType">The data type to check for.</param>
        /// <returns><c>true</c> if the data type is present.</returns
+>
        /// <summary>
        ///  public bool ClipboardDataHasType(string dataType)
        /// </summary>
        /// <param name="dataType">string</param>
        public bool ClipboardDataHasType(string dataType)
        {
            return dataType == m_dataType;
        }

        /// <summary>
        /// Gets the clipboard data.
        /// </summary>
        /// <param name="dataType">Type of the data.</param>
        /// <returns>
        /// The data on the clipboard matching the datatype
        /// </returns>
        /// <summary>
        ///  public object GetClipboardData(string dataType)
        /// </summary>
        /// <param name="dataType">string</param>
        public object GetClipboardData(string dataType)
[download]

Basically, the if ($file =~ /$comment$method/) { line is never matching, where $method is the declaration line and $comment is:

\\s*///\\s*<summary>\\s*///.*\\n\\s*///\\s*</summary>\\n(\\s*///.*\\n)
+*
[download]

This is the case whether I specify s, m, or both (in either sequence) for the matching.