This change modifies the python test runner to combine lines starting with a
failure report including up to 3 more lines, terminated by the next
"[ FAILED ]" line. These are all emitted on the same line as the file:line
indication, which allows Xcode's failure marker code to pick it up and display
it along with the error badge in the Xcode editor window. Makes for a nice
gtest development experience.
llvm-svn: 218518
4dcb6aded2