Forbid no/abundant whitespace before array initializer

Forbid these new int[]{... new int[] {....
airlift · Jan 10, 2024 · 39240d0 · 39240d0
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commit 39240d0
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diff --git a/CHANGES.md b/CHANGES.md
@@ -2,6 +2,7 @@ Airbase 149
 * Remove bval dependency
 * Checkstyle updates:
   - Disallow single-line non-empty lambda and method body code blocks.
+  - Require exactly one space between array type and array initializer.
 * Plugin updates:
   - git-commit-id-maven-plugin 7.0.0 (from 6.0.0)
   - spotbugs-maven-plugins 4.8.1.0 (from 4.7.3.6)

diff --git a/airbase-policy/src/main/resources/checkstyle/airbase-checks.xml b/airbase-policy/src/main/resources/checkstyle/airbase-checks.xml
@@ -272,6 +272,12 @@
             <property name="ignoreComments" value="true" />
         </module>
 
+        <module name="RegexpSinglelineJava">
+            <property name="format" value="\[\](\s{2,})?\{" />
+            <property name="message" value="Incorrect whitespace before array initializer" />
+            <property name="ignoreComments" value="true" />
+        </module>
+
         <!-- javadoc -->
         <module name="RequireEmptyLineBeforeBlockTagGroup" />
         <module name="NonEmptyAtclauseDescription" />