docs: fix several doxygen errors

Change-Id: If86c628b2b794cba0e3697bfe1d88ce752104ce1
Refs: #3210
diff --git a/src/encoding/encoder.hpp b/src/encoding/encoder.hpp
index a258d1e..f5f40ae 100644
--- a/src/encoding/encoder.hpp
+++ b/src/encoding/encoder.hpp
@@ -38,8 +38,8 @@
 public: // common interface between Encoder and Estimator
   /**
    * @brief Create instance of the encoder with the specified reserved sizes
-   * @param totalReserve  initial buffer size to reserve
-   * @param totalFromBack number of bytes to reserve for append* operations
+   * @param totalReserve    initial buffer size to reserve
+   * @param reserveFromBack number of bytes to reserve for append* operations
    */
   explicit
   Encoder(size_t totalReserve = 8800, size_t reserveFromBack = 400);