Sanitizer does not tell which file had an error

[tohanss]

Instead of giving this:

[ERROR] PlugError: ['Line 36: Missing prefix', 'Line 57: Missing prefix', 'Line 78: Missing prefix', 'Line 91: Missing prefix', 'Line 104: Missing prefix', 'Line 126: Missing prefix', 'Line 144: Missing prefix', 'Line 157: Missing prefix', 'Line 168: Missing prefix', 'Line 209: Missing prefix']

We probably want it to tell us what file caused this as well, (they are all the same file, since sanitizer reports errors on a file to file basis)

[slarse]

Yep, we definitely wanna say which file causes the error. Ideally, we should check all files before starting to sanitize, and report errors for all files at the same time. Perhaps check_syntax should return a list of errors, as opposed to raising an error. I'd imagine something like this:

Syntax errors detected in 2 file(s):

some/bad/file.txt
    Line 36: Missing prefix
    Line 57: Missing prefix
some/other/file.txt
    Line 2: Some other error message

When you design this, take inspiration from any compiler. For example, run the java compiler on a couple of obviously bad files and see what it says.