Fix operator error message

Author: hsutter

source/parse.h

@@ -1543,14 +1543,14 @@ class parser
             {
                 auto op  = curr().to_string(true);
                 auto msg = "postfix unary " + op;
-                if      (curr().type() == lexeme::Multiply ) { op += " (dereference)"         ; }
-                else if (curr().type() == lexeme::Ampersand) { op += " (address-of)"          ; }
-                else if (curr().type() == lexeme::Tilde    ) { op += " (unary bit-complement)"; }
+                if      (curr().type() == lexeme::Multiply ) { msg += " (dereference)"         ; }
+                else if (curr().type() == lexeme::Ampersand) { msg += " (address-of)"          ; }
+                else if (curr().type() == lexeme::Tilde    ) { msg += " (unary bit-complement)"; }
                 msg += " cannot be immediately followed by a (, identifier, or literal - add whitespace before "
                     + op + " here if you meant binary " + op;
-                if      (curr().type() == lexeme::Multiply ) { op += " (multiplication)"      ; }
-                else if (curr().type() == lexeme::Ampersand) { op += " (bitwise and)"         ; }
-                else if (curr().type() == lexeme::Tilde    ) { op += " (binarybit-complement)"; }
+                if      (curr().type() == lexeme::Multiply ) { msg += " (multiplication)"      ; }
+                else if (curr().type() == lexeme::Ampersand) { msg += " (bitwise and)"         ; }
+                else if (curr().type() == lexeme::Tilde    ) { msg += " (binarybit-complement)"; }
 
                 error(msg, false);
                 break;