output, classify and organize all of the dialogue type of messages. This paves
the way towards formalizing (and expanding!) the footnotes system with much
greater explanatory text, as well as providing much better fine-grained control
over which types of output that Tidy will produce.
Moved STRING_DOCTYPE_GIVEN, STRING_CONTENT_LOOKS, and STRING_NO_SYSID to the
Report paradigm from the Dialogue paradigm, as these are items that are
traditionally TidyInfo and included in the Report table, rather than any type
of dialogue.
At this point, we are exactly passing all tests.
At this point:
- MSVC on Windows 10 compiles without warnings or errors.
- GCC on Ubuntu 16.04 compiles without warnings or errors.
- Test cases in `testbase` are clean on all of:
- macOS
- Windows 10
- Ubunutu
Note that there are several regressions in the accessibility test suit that
are not related to output messages. These are a result of previous work, and
these results should be updated in the test suite when this item is merged.
reflects such. Some fleshed in report formatters are included with cases for
several of Tidy's reports, but nothing is yet enabled. All reporting is status
quo, and this is just a bunch of dead code at this point.
the basic reporting functions that share the same signature. This also resulted
in eliminating a string, and adding a new string to disambiguate between
errors and warnings.
This appears to be an issue with Word2000 handling of empty attributes.
A reproduction case can be seen here:
```
$ cat test.html
<html xmlns:o="urn:schemas-microsoft-com:office:office">
<body>
<table>
<img class="" />
</table>
</body>
</html>
$ ./tidy --tidy-mark no --word-2000 yes test.html
line 1 column 1 - Warning: missing <!DOCTYPE> declaration
line 3 column 1 - Warning: <img> isn't allowed in <table> elements
line 2 column 1 - Info: <table> previously mentioned
line 1 column 57 - Warning: inserting missing 'title' element
line 3 column 1 - Warning: <img> lacks "alt" attribute
line 3 column 1 - Warning: <img> lacks "src" attribute
line 2 column 1 - Warning: trimming empty <table>
line 1 column 1 - Warning: <html> proprietary attribute "xmlns:o"
[2] 52405 segmentation fault ./tidy --tidy-mark no --word-2000 yes test.html
```
This was called from 6f2fb6e0e7/src/clean.c (L1710).
(It is technically undefined behaviour to call strncmp with `NULL` pointers however).
