ICU-21293 Fix typo in rematch.cpp comment
arguements→arguments
diff --git a/icu4c/source/i18n/rematch.cpp b/icu4c/source/i18n/rematch.cpp
index 69909fa..8e49632 100644
--- a/icu4c/source/i18n/rematch.cpp
+++ b/icu4c/source/i18n/rematch.cpp
@@ -2072,7 +2072,7 @@
         UErrorCode      &status)
 {
     //
-    // Check arguements for validity
+    // Check arguments for validity
     //
     if (U_FAILURE(status)) {
         return 0;