' (apostrophe) within/at end of symbol not counted as part of symbol

Currently clojure-mode appears to be treating `dec'` as the symbol `dec` with a `'` following it.

This is made most obvious when I call `cider-find-var` on `dec'` at it finds the symbol at point to be `dec` and takes me to that function definition instead of `dec'`.

Care should be taken in resolving this bug that the prefixed `'` (such as in `'clojure.core/dec`) isn't treated as part of the symbol.