Encoding of files and help system

[JuanPi]

Hi all,

I found that files encoded with iso-8859-1 trigger an error in
.../m/help/get_first_help_sentence.m

error: regexp: the input string is invalid UTF-8
error: called from
    get_first_help_sentence>first_sentence_plain_text at line 89 column 14
    get_first_help_sentence at line 66 column 22
    doc_cache_create>handle_function at line 96 column 18
    doc_cache_create>create_cache at line 111 column 36
    gen_doc_cache_in_dir>@<anonymous> at line 143 column 16
    doc_cache_create>gen_doc_cache_in_dir at line 144 column 9
    doc_cache_create at line 55 column 12
    install>generate_lookfor_cache at line 810 column 5
    install at line 229 column 7
    pkg at line 475 column 9

Is this accepted behavior, or is it a bug?

-- 
JuanPi Carbajal
https://goo.gl/ayiJzi

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