only edit the string method

Author: rokke-git

base/show.jl

@@ -3028,6 +3028,8 @@ end
 
 nocolor(io::IO) = IOContext(io, :color => false)
 alignment_from_show(io::IO, x::Any) =
+    textwidth(sprint(show, x, context=nocolor(io), sizehint=0))
+alignment_from_show(io::IO, x::AbstractString) =
     textwidth(sprint(show, MIME"text/plain"(), x, context=nocolor(io), sizehint=0))
 
 """