Merge pull request #714 from IETS3/bugfix/improve_unit_error_msg

Improve unit error messages

Author: HeikoBecker

code/languages/org.iets3.opensource/languages/org.iets3.core.expr.collections/models/typesystem.mps

@@ -495,7 +495,7 @@
                           </node>
                           <node concept="3cpWs3" id="TcaAhOJ3xK" role="2MkJ7o">
                             <node concept="Xl_RD" id="TcaAhOJ4bz" role="3uHU7B">
-                              <property role="Xl_RC" value="No common supertype found:" />
+                              <property role="Xl_RC" value="Incompatible element types – " />
                             </node>
                             <node concept="2OqwBi" id="TcaAhODq_G" role="3uHU7w">
                               <node concept="Jnkvi" id="TcaAhODqaP" role="2Oq$k0">

code/languages/org.iets3.opensource/languages/org.iets3.core.expr.typetags.units/models/org.iets3.core.expr.typetags.units.plugin.mps

@@ -1168,7 +1168,7 @@
               <ref role="1Pybhc" to="wyt6:~String" resolve="String" />
               <ref role="37wK5l" to="wyt6:~String.format(java.lang.String,java.lang.Object...)" resolve="format" />
               <node concept="Xl_RD" id="69hlyJ6fP5k" role="37wK5m">
-                <property role="Xl_RC" value="The different types \&quot;%s\&quot; cannot be combined. Only types with same unit can be combined." />
+                <property role="Xl_RC" value="The different types \&quot;%s\&quot; are incompatible. Only types with same unit are compatible." />
               </node>
               <node concept="37vLTw" id="69hlyJ6g7p8" role="37wK5m">
                 <ref role="3cqZAo" node="69hlyJ6g7oT" resolve="typesErrorMsg" />