IDEA-100693 copy/paste of a whole line adds extra space indent

Correct white space info construction on formatting - handle a situation when indent space contains tabulations after white spaces

platform/lang-impl/src/com/intellij/formatting/WhiteSpace.java

@@ -181,7 +181,7 @@ class WhiteSpace {
           myIndentSpaces = 0;
           break;
         case '\t':
-          myIndentSpaces += tabSize;
+          myIndentSpaces += tabSize - (mySpaces % tabSize);
           break;
         default: mySpaces++;
       }