Fix to finding clang-version for includes.

src/source.cc

@@ -1414,7 +1414,7 @@ std::vector<std::string> Source::ClangViewParse::get_compilation_commands() {
     }
   }
   auto clang_version_string=clang::to_string(clang_getClangVersion());
-  const std::regex clang_version_regex("^clang version ([0-9.]+).*$");
+  const std::regex clang_version_regex("^[A-Za-z ]+([0-9.]+).*$");
   std::smatch sm;
   if(std::regex_match(clang_version_string, sm, clang_version_regex)) {
     auto clang_version=sm[1].str();