Don’t add methods to the functions > and >= (#4065)

Author: nsajko

docs/src/manual/nonlinear.md

@@ -476,7 +476,7 @@ julia> f(x::Vector{VariableRef}) = x[1] > 1 ? 0 : x[2]
 f (generic function with 1 method)
 
 julia> f(x)
-ERROR: Cannot evaluate `>` between a variable and a number.
+ERROR: Cannot evaluate `<` between a variable and a number.
 [...]
 ```
 

src/variables.jl

@@ -3403,7 +3403,7 @@ There are three common mistakes that lead to this.
     )
 end
 
-for sym in (:(<=), :(>=), :(<), :(>))
+for sym in (:(<=), :(<))
     err = _logic_error_exception(sym)
     @eval begin
         Base.$(sym)(::GenericVariableRef, ::Number) = throw($err)

test/test_variable.jl

@@ -1107,12 +1107,12 @@ end
 function test_error_messages()
     model = Model()
     @variable(model, x)
-    @test_throws JuMP._logic_error_exception(:>=) x >= 1
-    @test_throws JuMP._logic_error_exception(:>=) 1 >= x
+    @test_throws JuMP._logic_error_exception(:<=) x >= 1
+    @test_throws JuMP._logic_error_exception(:<=) 1 >= x
     @test_throws JuMP._logic_error_exception(:<=) x <= 1
     @test_throws JuMP._logic_error_exception(:<=) 1 <= x
-    @test_throws JuMP._logic_error_exception(:>) x > 1
-    @test_throws JuMP._logic_error_exception(:>) 1 > x
+    @test_throws JuMP._logic_error_exception(:<) x > 1
+    @test_throws JuMP._logic_error_exception(:<) 1 > x
     @test_throws JuMP._logic_error_exception(:<) x < 1
     @test_throws JuMP._logic_error_exception(:<) 1 < x
     return