Add doc comments to new PathUtils members

src/PowerShellEditorServices/Utility/PathUtils.cs

@@ -30,6 +30,11 @@ internal static class PathUtils
         /// </summary>
         internal static readonly char AlternatePathSeparator = RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? '/' : '\\';
 
+        /// <summary>
+        /// The <see cref="StringComparison" /> value to be used when comparing paths. Will be
+        /// <see cref="StringComparison.Ordinal" /> for case sensitive file systems and <see cref="StringComparison.OrdinalIgnoreCase" />
+        /// in case insensitive file systems.
+        /// </summary>
         internal static readonly StringComparison PathComparison = RuntimeInformation.IsOSPlatform(OSPlatform.Linux)
             ? StringComparison.Ordinal
             : StringComparison.OrdinalIgnoreCase;
@@ -41,6 +46,15 @@ internal static class PathUtils
         /// <returns>The normalized path.</returns>
         public static string NormalizePathSeparators(string path) => string.IsNullOrWhiteSpace(path) ? path : path.Replace(AlternatePathSeparator, DefaultPathSeparator);
 
+        /// <summary>
+        /// Determines whether two specified strings represent the same path.
+        /// </summary>
+        /// <param name="left">The first path to compare, or <see langword="null" />.</param>
+        /// <param name="right">The second path to compare, or <see langword="null" />.</param>
+        /// <returns>
+        /// <see langword="true" /> if the value of <paramref name="left" /> represents the same
+        /// path as the value of <paramref name="right" />; otherwise, <see langword="false" />.
+        /// </returns>
         internal static bool IsPathEqual(string left, string right)
         {
             if (string.IsNullOrEmpty(left))