ICU-23252 reformat

Author: FrankYFTang

icu4j/main/core/src/main/java/com/ibm/icu/text/MessagePattern.java

@@ -1382,9 +1382,9 @@ private static int parseArgNumber(CharSequence s, int start, int limit) {
         } else {
             return ARG_NAME_NOT_NUMBER;
         }
-        while(start<limit) {
+        while(start < limit) {
             c = s.charAt(start++);
-            if('0'<=c && c <= '9') {
+            if('0' <= c && c <= '9') {
                 if(number >= Integer.MAX_VALUE / 10) {
                     badNumber = true;  // overflow
                 } else {