Problem: Test_termdebug_decimal_breakpoints() fails with List index out
of range, because when adding the second breakpoint, the
cursor is still on the very first line (a header include line)
and therefore gdb refuses to set the breakpoint with:
`msg="No compiled code for line 1 in file XTD_decimal.c"`
Solution: Run the program, so that it will break at the very first
defined breakpoint and then once we are in the program,
set further breakpoints
closes: vim/vim#17689faed074ab7
Co-authored-by: Christian Brabandt <cb@256bit.org>
Problem: tests: plugin tests are named inconsistently
Solution: group them under a common 'plugin' prefix
related: vim/vim#16599934d9ab3a2
Co-authored-by: Christian Brabandt <cb@256bit.org>