add more help text

cmd/sqrtRepetend.go

@@ -52,10 +52,17 @@ func sqrtRepetend(cmd *cobra.Command, args []string) {
 // sqrtRepetendCmd represents the sqrtRepetend command
 var sqrtRepetendCmd = &cobra.Command{
 	Use:   "sqrt-repetend N [N ...]",
-	Short: "Compute the repetend of the square root of the input",
-	Long:  `Compute the repetend of the square root of the input.`,
-	Args:  cobra.MinimumNArgs(1),
-	Run:   sqrtRepetend,
+	Short: "Compute the repetend of the continued fraction of square roots",
+	Long: `Compute the repetend of the continued fraction of the square root of the input.
+
+For each argument n, this will output the repetend of the continued fraction of sqrt(n). For example,
+mathtools sqrt-repetend 12 15 19
+will output
+2 6
+1 6
+2 1 3 1 2 8`,
+	Args: cobra.MinimumNArgs(1),
+	Run:  sqrtRepetend,
 }
 
 func init() {