error in jldoctest with # output followed by no-newline #765
Description
The documentatioun states:
the amount of whitespace appearing above and below the # output line is not significant and can be increased or decreased if desired.
However, a block like the following breaks doctesting:
```jldoctest
# output
```(it doesn't matter what is before "# output")
I get:
> running doctests.
ERROR: BoundsError: attempt to access 1-element Array{SubString{String},1} at index [2]
Stacktrace:
[1] indexed_iterate at ./array.jl:731 [inlined]
[2] eval_script(::Markdown.Code, ::Module, ::Dict{Symbol,Any}, ::Documenter.Documents.Document, ::Documenter.Documents.Page) at /home/rfourquet/.julia/packages/Doc
umenter/Psnl/src/DocChecks.jl:261
[3] doctest(::Markdown.Code, ::Dict{Symbol,Any}, ::Documenter.Documents.Document, ::Documenter.Documents.Page) at /home/rfourquet/.julia/packages/Documenter/Psnl/s
rc/DocChecks.jl:187
[4] (::getfield(Documenter.DocChecks, Symbol("##1#2")){Documenter.Documents.Document})(::Markdown.Code) at /home/rfourquet/.julia/packages/Documenter/Psnl/src/DocC
hecks.jl:124
[5] walk(::getfield(Documenter.DocChecks, Symbol("##1#2")){Documenter.Documents.Document}, ::Dict{Symbol,Any}, ::Markdown.Code) at /home/rfourquet/.julia/packages/
Documenter/Psnl/src/Documents.jl:446
[6] doctest(::Documenter.Documents.Document) at /home/rfourquet/.julia/packages/Documenter/Psnl/src/DocChecks.jl:123
[7] runner(::Type{Documenter.Builder.CheckDocument}, ::Documenter.Documents.Document) at /home/rfourquet/.julia/packages/Documenter/Psnl/src/Builder.jl:189
[8] dispatch(::Type{Documenter.Builder.DocumentPipeline}, ::Documenter.Documents.Document) at /home/rfourquet/.julia/packages/Documenter/Psnl/src/Selectors.jl:168
[9] #2 at /home/rfourquet/.julia/packages/Documenter/Psnl/src/Documenter.jl:204 [inlined]
[10] cd(::getfield(Documenter, Symbol("##2#3")){Documenter.Documents.Document}, ::String) at ./file.jl:96
[11] #makedocs#1(::Bool, ::Base.Iterators.Pairs{Symbol,Any,NTuple{5,Symbol},NamedTuple{(:modules, :clean, :format, :sitename, :pages),Tuple{Array{Module,1},Bo
ol,Symbol,String,Array{Any,1}}}}, ::Function) at /home/rfourquet/.julia/packages/Documenter/Psnl/src/Documenter.jl:203
[12] (::getfield(Documenter, Symbol("#kw##makedocs")))(::NamedTuple{(:modules, :clean, :format, :sitename, :pages),Tuple{Array{Module,1},Bool,Symbol,String,Ar
ray{Any,1}}}, ::typeof(makedocs)) at ./none:0
[13] top-level scope at none:0