Disable token compress in str

There are certain cases where we use this split function, and we expect
tokens to be read out.  For example:

/xyz/openbmc_project/sensors/unit/name

Should split into a "" in the first position.  This use case is not
common, and a quick grep shows only two places in the code expect this
behavior.  Boost::split has this behavior already, which is what this
function is emulating.  While we could fix these, in the end they should
be following the rules outlined in COMMON_ERRORS.md, which disallow
this kind of parsing completely.

Tested: New unit tests passing.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: Iec3dcbf2b495b2b3b4ed419172c4133b16f7c65d
diff --git a/include/str_utility.hpp b/include/str_utility.hpp
index 39e1c82..7142583 100644
--- a/include/str_utility.hpp
+++ b/include/str_utility.hpp
@@ -14,10 +14,11 @@
 {
     size_t start = 0;
     size_t end = 0;
-    while ((start = str.find_first_not_of(delim, end)) != std::string::npos)
+    while (end <= str.size())
     {
         end = str.find(delim, start);
         strings.emplace_back(str.substr(start, end - start));
+        start = end + 1;
     }
 }
 } // namespace bmcweb