Daniel Pfeifer 618fb23fc9 Pass arguments that are not modified as const&. ...

Use clang-tidy's performance-unnecessary-value-param checker to find
value parameter declarations of expensive to copy types that are not
modified inside the function.  Ignore findings in kwsys.
After applying the fix-its, manually change `const T&` to `T const&`.

2016-05-26 21:58:51 +02:00

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