gn: Fix some typos in unittests.

tools/gn/substitution_pattern_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "tools/gn/err.h"
 #include "tools/gn/substitution_pattern.h"
 
 TEST(SubstitutionPattern, ParseLiteral) {
   SubstitutionPattern pattern;
   Err err;
   EXPECT_TRUE(pattern.Parse("This is a literal", NULL, &err));
   EXPECT_FALSE(err.has_error());
   ASSERT_EQ(1u, pattern.ranges().size());
   EXPECT_EQ(SUBSTITUTION_LITERAL, pattern.ranges()[0].type);
   EXPECT_EQ("This is a literal", pattern.ranges()[0].literal);
 }
 
-TEST(SubstitutionPatterm, ParseComplex) {
+TEST(SubstitutionPattern, ParseComplex) {
   SubstitutionPattern pattern;
   Err err;
   EXPECT_TRUE(pattern.Parse(
       "AA{{source}}{{source_name_part}}BB{{source_file_part}}", NULL, &err));
   EXPECT_FALSE(err.has_error());
   ASSERT_EQ(5u, pattern.ranges().size());
 
   EXPECT_EQ(SUBSTITUTION_LITERAL, pattern.ranges()[0].type);
   EXPECT_EQ("AA", pattern.ranges()[0].literal);
   EXPECT_EQ(SUBSTITUTION_SOURCE, pattern.ranges()[1].type);
@@ skipping 10 matching lines @@
   EXPECT_TRUE(err.has_error());
 
   err = Err();
   EXPECT_FALSE(pattern.Parse("{{source_of_evil}}", NULL, &err));
   EXPECT_TRUE(err.has_error());
 
   err = Err();
   EXPECT_FALSE(pattern.Parse("{{source{{source}}", NULL, &err));
   EXPECT_TRUE(err.has_error());
 }