Fix -Wstring-plus-int errors in ninja_action_target_writer_unittest

Change-Id: I04d6372cc5e7a2247f5798e5e6ee0105d1fb3994
Reviewed-on: https://gn-review.googlesource.com/c/gn/+/4501
Reviewed-by: Scott Graham <scottmg@chromium.org>
Commit-Queue: Julie Hockett <juliehockett@google.com>

tools/gn/ninja_action_target_writer_unittest.cc

diff --git a/tools/gn/ninja_action_target_writer_unittest.cc b/tools/gn/ninja_action_target_writer_unittest.cc
index 19f81ae..90173b3 100644
--- a/tools/gn/ninja_action_target_writer_unittest.cc
+++ b/tools/gn/ninja_action_target_writer_unittest.cc
@@ -60,8 +60,7 @@
   NinjaActionTargetWriter writer(&target, out);
   writer.Run();
 
-  const char* expected = 1 /* skip initial newline */ + R"(
-rule __foo_bar___rule
+  const char* expected = R"(rule __foo_bar___rule
   command = /usr/bin/python ../../foo/script.py
   description = ACTION //foo:bar()
   restat = 1
@@ -70,7 +69,7 @@
 
 build obj/foo/bar.stamp: stamp foo.out
 )";
-  EXPECT_EQ(expected, out.str());
+  EXPECT_EQ(expected, out.str()) << expected << "--" << out.str();
 }
 
 // Tests an action with no sources and pool
@@ -105,8 +104,7 @@
 
   // The console pool's name must be mapped exactly to the string "console"
   // which is a special pre-defined pool name in ninja.
-  const char* expected = 1 /* skip initial newline */ + R"(
-rule __foo_bar___rule
+  const char* expected = R"(rule __foo_bar___rule
   command = /usr/bin/python ../../foo/script.py
   description = ACTION //foo:bar()
   restat = 1