Update tests to match 2-space indenting.

(The indenting was changed from 4 spaces per level to 2 in order
to better match eeschema's netlist output and pcbnew's board file
output.)

qa/libs/sexpr/test_sexpr.cpp

@@ -103,7 +103,7 @@ BOOST_AUTO_TEST_CASE( AsStringList )
     // REVIEW: should there be a space at the end of the "symbol"?
     BOOST_CHECK_PREDICATE( KI_TEST::SexprConvertsToString,
             ( (SEXPR::SEXPR&) s_list )( "(symbol \n"
-                                        "    (2 42.42 \"substring\") 1 3.14 \"string\")" ) );
+                                        "  (2 42.42 \"substring\") 1 3.14 \"string\")" ) );
 }
 
 BOOST_AUTO_TEST_SUITE_END()

qa/libs/sexpr/test_sexpr_parser.cpp

@@ -220,7 +220,7 @@ BOOST_AUTO_TEST_CASE( StringRoundtrip )
         },
         {
             "nested list", // REVIEW space after 42?
-            "(42 \n    (1 2))",
+            "(42 \n  (1 2))",
         },
     };