More helpful error messages for calling log/sqrt with negative real arguments (JuliaLang/julia#48347)

* More helpful error messages for log/sqrt with negative real arguments

Author: sloede

src/remotecall.jl

@@ -485,7 +485,7 @@ julia> remotecall_fetch(sqrt, 2, 4)
 julia> remotecall_fetch(sqrt, 2, -4)
 ERROR: On worker 2:
 DomainError with -4.0:
-sqrt will only return a complex result if called with a complex argument. Try sqrt(Complex(x)).
+sqrt was called with a negative real argument but will only return a complex result if called with a complex argument. Try sqrt(Complex(x)).
 ...
 ```
 """

test/distributed_exec.jl

@@ -1453,7 +1453,7 @@ let thrown = false
         thrown = true
         local b = IOBuffer()
         showerror(b, e)
-        @test occursin("sqrt will only return", String(take!(b)))
+        @test occursin("sqrt was called with a negative real argument", String(take!(b)))
     end
     @test thrown
 end