[AutoDetectIndent] getTotalLinesWithLeadingSpaces returns value needed, no need in subtracting

platform/lang-impl/src/com/intellij/psi/codeStyle/autodetect/IndentOptionsDetectorImpl.java

@@ -99,8 +99,7 @@ public class IndentOptionsDetectorImpl implements IndentOptionsDetector {
     }
 
     if (maxUsedIndentSize <= MAX_INDENT_TO_DETECT) {
-      int totalUsagesWithoutZeroIndent = stats.getTotalLinesWithLeadingSpaces() - stats.getTimesIndentUsed(0);
-      double usageRate = (double)maxUsedIndentInfo.getTimesUsed() / totalUsagesWithoutZeroIndent;
+      double usageRate = (double)maxUsedIndentInfo.getTimesUsed() / stats.getTotalLinesWithLeadingSpaces();
       if (usageRate > RATE_THRESHOLD) {
         return maxUsedIndentSize;
       }

platform/platform-tests/testData/codeStyle/autodetect/manyZeroIndents.java

@@ -0,0 +1,24 @@
+# Assignment:
+number   = 42
+opposite = true
+
+# Conditions:
+number = -42 if opposite
+
+# Functions:
+square = (x) -> x * x
+
+# Arrays:
+list = [1, 2, 3, 4, 5]
+
+# Objects:
+math =
+  root:   Math.sqrt
+  square: square
+  cube:   (x) -> x * square x
+
+# Existence:
+alert "I knew it!" if elvis?
+
+# Array comprehensions:
+cubes = (math.cube num for num in list)

platform/platform-tests/testSrc/com/intellij/psi/autodetect/IndentAutoDetectionTest.java

@@ -74,6 +74,8 @@ public class IndentAutoDetectionTest extends LightPlatformCodeInsightTestCase {
     doTestIndentSize(4);
   }
 
+  public void testManyZeroIndents() { doTestIndentSize(2); }
+
   public void testSpacesToNumbers() throws Exception {
     String text = "     i\n" +
                   "    a\n" +