Tweak Javadoc spelling
diff --git a/src/main/java/org/apache/commons/cli/Options.java b/src/main/java/org/apache/commons/cli/Options.java
index 1d02220..00fa414 100644
--- a/src/main/java/org/apache/commons/cli/Options.java
+++ b/src/main/java/org/apache/commons/cli/Options.java
@@ -120,7 +120,7 @@
* </p>
*
* @param opt Short single-character name of the option.
- * @param hasArg flag signally if an argument is required after this option
+ * @param hasArg flag signalling if an argument is required after this option
* @param description Self-documenting description
* @return the resulting Options instance
*/
@@ -139,7 +139,7 @@
*
* @param opt Short single-character name of the option.
* @param longOpt Long multi-character name of the option.
- * @param hasArg flag signally if an argument is required after this option
+ * @param hasArg flag signalling if an argument is required after this option
* @param description Self-documenting description
* @return the resulting Options instance
*/
@@ -166,7 +166,7 @@
*
* @param opt Short single-character name of the option.
* @param longOpt Long multi-character name of the option.
- * @param hasArg flag signally if an argument is required after this option
+ * @param hasArg flag signalling if an argument is required after this option
* @param description Self-documenting description
* @return the resulting Options instance
* @since 1.4