_Generic multiple test works
Test fixes
String literals have type 'char *'
String interning - for upcoming __func__ change
Only create labels for used strings
layout_normalise handles .ascii directives
String test fixes for the new .ascii output
layout_sort checks for duplicate labels
Single warning per operator
Check for comparison with string literal
String lengths are size_t, not int
expr-string does the string lookup itself
Tidied __func__ mutation into string
Strings can be addressed (including __func__)
__func__ tests