Handles mismatches

mj.vim

@@ -6,6 +6,14 @@
 syntax case match
 
 
+" Mismatches 
+syntax match Error "end where"
+syntax match Error "end if"
+syntax match Error ")"
+syntax match Error "\]"
+syntax match Error "\*)"
+
+
 " Static type parameters
 syntax region Type start="<" end=">"
 syntax match Type ":\[[^\]]\+\]"