strip_gensym: handle unicode correctly (#129)

fixes JuliaDebug/Cthulhu.jl#583

Author: simeonschaub

src/utils.jl

@@ -201,10 +201,10 @@ function strip_gensym(str::AbstractString)
     if startswith(str, '#')
         idx = findnext('#', str, 2)
         if idx !== nothing
-            return Symbol(str[2:idx-1])
+            return Symbol(str[2:prevind(str, idx)])
         end
     end
-    endswith(str, "##kw") && return Symbol(str[1:end-4])
+    endswith(str, "##kw") && return Symbol(str[1:prevind(str, end-3)])
     return Symbol(str)
 end
 

test/runtests.jl

@@ -432,3 +432,8 @@ end
     body, _ = CodeTracking.definition(String, which(diffminmax, (Any,)))
     @test body == "diffminmax((min, max)) = max - min"
 end
+
+@testset "strip_gensym with unicode" begin
+    @test CodeTracking.strip_gensym("#𝓔′#90") == :𝓔′
+    @test CodeTracking.strip_gensym("𝓔′##kw") == :𝓔′
+end