Fix issue with single-term recognition

Author: kpeeters

core/Algorithm.cc

@@ -812,7 +812,9 @@ bool Algorithm::is_single_term(iterator it)
 			return true;
 		else if(*tr.parent(it)->name!="\\prod" && it->fl.parent_rel==str_node::parent_rel_t::p_none
 				  && kernel.properties.get<Accent>(tr.parent(it))==0 ) {
+#ifdef DEBUG			
 			std::cerr << "Found single term in " << tr.parent(it) << std::endl;
+#endif
 			return true;
 			}
 		}

web2/cadabra2/source/download.html

@@ -101,15 +101,15 @@ <h2>Binary packages</h2>
 	 <div class="distronum"><a href="https://cadabra.science/packages/debian9">Debian Stretch 9</a></div>
   </div>
 
-  <div class="distrotype">
+<!--  <div class="distrotype">
 	 <img src="static/images/apple_logo.png"/>
 	 <div class="distronum">macOS</a></div>
 	 <div class="distrotxt">
 		Cadabra is available via the Homebrew package manager; just type
 		<code>brew install cadabra2</code>
 		to take care of installation.
 	 </div>
-  </div>
+  </div> -->
 
   <div class="distrotype">
 	 <img src="static/images/windows_logo.png"/>