Update Cryville.Common.

Assets/Cryville/Common/StringUtils.cs

@@ -2,10 +2,24 @@
 using System.Text;
 
 namespace Cryville.Common {
+	/// <summary>
+	/// Provides a set of <see langword="static" /> methods related to string operations.
+	/// </summary>
 	public static class StringUtils {
+		/// <summary>
+		/// Removes the extension in a file name or file path.
+		/// </summary>
+		/// <param name="s">The file name or file path.</param>
+		/// <returns>The file name or file path with the extension removed.</returns>
 		public static string TrimExt(string s) {
 			return s.Substring(0, s.LastIndexOf("."));
 		}
+		/// <summary>
+		/// Converts the value of a <see cref="TimeSpan" /> to a human-readable string.
+		/// </summary>
+		/// <param name="timeSpan">The time span.</param>
+		/// <param name="digits">The digit count for seconds.</param>
+		/// <returns>A human-readable string representing the time span.</returns>
 		public static string ToString(this TimeSpan timeSpan, int digits) {
 			var b = new StringBuilder();
 			bool flag = false;