Everything after an open multiline comment gets deleted

[mortenpi]

If you have something like this

foo() = nothing
#=
...

Then everything after #= gets erased:

(@format) pkg> st
Status `~/.julia/environments/format/Project.toml`
  [98e50ef6] JuliaFormatter v1.0.36

julia> s = """
       foo() = nothing
       #=
       ...
       """
"foo() = nothing\n#=\n...\n"

julia> format_text(s)
"foo() = nothing\n"

This can be pretty bad if you have Format on Save enabled.

[domluna]

assumes there's a closing =#. but could come up if you format before you add it.

[domluna]

this might be better filed with CSTParser

┌ Info:
│   t = 1,9-1,15         IDENTIFIER     "nothing"
└   t.val = "nothing"
┌ Info:
│   t = 1,16-2,0         WHITESPACE     "\n"
└   t.val = "\n"
┌ Info:
│   t = 2,1-4,0          ERROR          "#=\na = 10\n"
└   t.val = "#=\na = 10\n"
┌ Info:
│   t = 4,1-4,0          ENDMARKER      ""
└   t.val = ""

t = 2,1-4,0 ERROR "#=\na = 10\n"

it's identified as an ERROR and not a comment. Same thing with JuliaSyntax, but at least JuliaSyntax throws an error

julia> JuliaSyntax.parse(JuliaSyntax.SyntaxNode, s)
ERROR: ParseError:
# Error @ line 2:1
foo() = nothing
┌─
#=
a = 10
#────┘ ── unexpected text after parsing statement
Stacktrace:
 [1] _parse(rule::Symbol, need_eof::Bool, ::Type{…}, text::String, index::Int64; version::VersionNumber, ignore_trivia::Bool, filename::Nothing, first_line::Int64, ignore_errors::Bool, ignore_warnings::Bool, kws::@Kwargs{})
   @ JuliaSyntax ~/.julia/packages/JuliaSyntax/z5WbP/src/parser_api.jl:93
 [2] _parse (repeats 2 times)
   @ JuliaSyntax ~/.julia/packages/JuliaSyntax/z5WbP/src/parser_api.jl:77 [inlined]
 [3] parsestmt(::Type{SyntaxNode}, text::String)
   @ JuliaSyntax ~/.julia/packages/JuliaSyntax/z5WbP/src/parser_api.jl:140
 [4] parse(::Type, ::Vararg{Any}; kwargs::@Kwargs{})
   @ JuliaSyntax ./deprecated.jl:116
 [5] parse(::Type, ::Vararg{Any})
   @ JuliaSyntax ./deprecated.jl:113
 [6] top-level scope
   @ REPL[16]:1
Some type information was truncated. Use `show(err)` to see complete types.

I'm not sure if it's appropriate for JuliaFormatter to throw an error when an ERROR is encountered but I suppose a fix for this specific case could work.