Title: Similar expressions, but not instances
Goal: Merge all instances of the expression `X + 1'
 in the function call `g(X+1)'.
Parameters:
    [   {file,"esimilar.erl"},
        {posrange,{52,56}},
        {varname,"H"} ].
Documentation:
 The expression can be substituted, however,
 neither the `X+1' in the head of the list comprehension,
 nor the `X+1' in the function
 is one of its instances.
 An advanced version of the transformation might remove the paretheses around
 the original instance.
