Added a comment and another test for the UT_ForIndentation option

llvm-svn: 191530

clang/lib/Format/WhitespaceManager.cpp

@@ -290,6 +290,8 @@ void WhitespaceManager::appendIndentText(std::string &Text,
   case FormatStyle::UT_ForIndentation:
     if (WhitespaceStartColumn == 0) {
       unsigned Indentation = IndentLevel * Style.IndentWidth;
+      // This happens, e.g. when a line in a block comment is indented less than
+      // the first one.
       if (Indentation > Spaces)
         Indentation = Spaces;
       unsigned Tabs = Indentation / Style.TabWidth;

clang/unittests/Format/FormatTest.cpp

@@ -5932,7 +5932,19 @@ TEST_F(FormatTest, ConfigurableUseOfTab) {
                    "\t/*\n"
                    "\n"
                    "\t*/\n"
-                   "}", Tab));
+                   "}",
+                   Tab));
+  EXPECT_EQ("{\n"
+            "\t/*\n"
+            " asdf\n"
+            "\t*/\n"
+            "}",
+            format("{\n"
+                   "\t/*\n"
+                   " asdf\n"
+                   "\t*/\n"
+                   "}",
+                   Tab));
 
   Tab.UseTab = FormatStyle::UT_Never;
   EXPECT_EQ("/*\n"