Make sure to not split string literals at the first character.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176447 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/Format/FormatTest.cpp b/unittests/Format/FormatTest.cpp
index 46eb1bc..eafc4c8 100644
--- a/unittests/Format/FormatTest.cpp
+++ b/unittests/Format/FormatTest.cpp
@@ -3043,6 +3043,14 @@
   EXPECT_EQ("\"some\"\n"
             "\" text\"",
             format("\"some text\"", getLLVMStyleWithColumns(6)));
+  EXPECT_EQ("\"some\"\n"
+            "\" tex\"\n"
+            "\" and\"",
+            format("\"some tex and\"", getLLVMStyleWithColumns(6)));
+  EXPECT_EQ("\"some\"\n"
+            "\"/tex\"\n"
+            "\"/and\"",
+            format("\"some/tex/and\"", getLLVMStyleWithColumns(6)));
 
   EXPECT_EQ("variable =\n"
             "    \"long string \"\n"