Apply minor cosmetic changes

Two blank lines within methods, for consistency with other files

src/algorithms/signal_source/adapters/fifo_signal_source.cc

@@ -52,6 +52,7 @@ FifoSignalSource::FifoSignalSource(ConfigurationInterface const* configuration,
         }
 }
 
+
 void FifoSignalSource::connect(gr::top_block_sptr top_block)
 {
     // here we could add a throttle as done in the file_source_base if required
@@ -62,6 +63,7 @@ void FifoSignalSource::connect(gr::top_block_sptr top_block)
         }
 }
 
+
 void FifoSignalSource::disconnect(gr::top_block_sptr top_block)
 {
     if (dump_)
@@ -71,11 +73,13 @@ void FifoSignalSource::disconnect(gr::top_block_sptr top_block)
         }
 }
 
+
 size_t FifoSignalSource::item_size()
 {
     return item_size_;
 }
 
+
 gr::basic_block_sptr FifoSignalSource::get_left_block()
 {
     LOG(WARNING) << "Left block of a signal source should not be retrieved";

src/algorithms/signal_source/gnuradio_blocks/fifo_reader.h

@@ -49,7 +49,6 @@ private:
     //! (gr handles this with public and private header pair)
     FifoReader(const std::string &file_name, const std::string &sample_type);
 
-
     size_t read_gr_complex(int noutput_items, gr_vector_void_star &output_items);
     //! function to read data out of FIFO which is stored as interleaved I/Q stream.
     //! template argument determines sample_type