- make the scanner not whitelist anything for test cases making
everything non-ascii forced to be hex encoded
- update all tests using non-ascii bytes to use %hex[] sequences
Closes#17331
The threee tags `<name>`, `</name>` and `<command>` were frequently used
with a leading space that this removes. The reason this habbit is so
widespread in testcases is probably that they have been copy and pasted.
Hence, fixing them all now might curb this practice from now on.
Closes#12028