IDEA-63313 CamelHump immediately after digit is not taken into account

1. Corrected 'camel humps' selection when target work contains digit just before the 'hump';
2. Corresponding test is added;

platform/platform-impl/src/com/intellij/openapi/editor/actions/EditorActionUtil.java

@@ -165,9 +165,9 @@ public class EditorActionUtil {
 
     if (isCamel) {
       if (firstIsIdentifierPart && secondIsIdentifierPart &&
-          (Character.isLowerCase(prev) && Character.isUpperCase(current) ||
+          (isLowerCaseOrDigit(prev) && Character.isUpperCase(current) ||
            prev == '_' && current != '_' ||
-           Character.isUpperCase(prev) && Character.isUpperCase(current) && Character.isLowerCase(next))) {
+           Character.isUpperCase(prev) && Character.isUpperCase(current) && isLowerCaseOrDigit(next))) {
         return true;
       }
     }
@@ -175,6 +175,10 @@ public class EditorActionUtil {
     return (Character.isWhitespace(prev) || firstIsIdentifierPart) &&
            !Character.isWhitespace(current) && !secondIsIdentifierPart;
   }
+  
+  private static boolean isLowerCaseOrDigit(char c) {
+    return Character.isLowerCase(c) || Character.isDigit(c);
+  }
 
   public static boolean isWordEnd(CharSequence text, int offset, boolean isCamel) {
     char prev = offset > 0 ? text.charAt(offset - 1) : 0;

platform/testFramework/src/com/intellij/testFramework/LightPlatformCodeInsightTestCase.java

@@ -492,6 +492,14 @@ public abstract class LightPlatformCodeInsightTestCase extends LightPlatformTest
     doAction(IdeActions.ACTION_EDITOR_PASTE);
   }
   
+  protected static void moveCaretToPreviousWordWithSelection() {
+    doAction("EditorPreviousWordWithSelection");
+  }
+
+  protected static void moveCaretToNextWordWithSelection() {
+    doAction("EditorNextWordWithSelection");
+  }
+  
   protected static void lineComment() {
     new CommentByLineCommentHandler().invoke(getProject(), getEditor(), getFile());
   }