common/hobject.h: fix syntax in doxygen comment

fix the error invocation of formula in documentation

Error invocation of formula in documentation, the second formula was
started with $f instead of the correct \f$

see also http://www.doxygen.nl/manual/formulas.html

Signed-off-by: Albert <albert.tests@gmail.com>

diff --git a/src/common/hobject.h b/src/common/hobject.h
index dd66af87f5bdd09205aa1965f647ae9d101d0bbc..a3812b9b1542f076f89ea43312809edfdc8f7211 100644 (file)
--- a/src/common/hobject.h
+++ b/src/common/hobject.h
@@ -227,7 +227,7 @@ public:
    * Returns set S of strings such that for any object
    * h where h.match(bits, mask), there is some string
    * s \f$\in\f$ S such that s is a prefix of h.to_str().
-   * Furthermore, for any s $f\in\f$ S, s is a prefix of
+   * Furthermore, for any s \f$\in\f$ S, s is a prefix of
    * h.str() implies that h.match(bits, mask).
    */
   static std::set<std::string> get_prefixes(