Utils: `templateChar + propName` is `templateName`

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: I5f2d1727b44073920dd40c598f920c9a94da5517
diff --git a/src/Utils.cpp b/src/Utils.cpp
index b23754f..c19ec12 100644
--- a/src/Utils.cpp
+++ b/src/Utils.cpp
@@ -263,7 +263,7 @@
                       strPtr->at(nextItemIdx)) == mathChars.end())
         {
             std::string val = std::visit(VariantToStringVisitor(), propValue);
-            boost::ireplace_all(*strPtr, templateChar + propName, val);
+            boost::ireplace_all(*strPtr, templateName, val);
             continue;
         }