Add test case for print TAB

Author: boriel

tests/runtime/cases/print_tab.bas

@@ -0,0 +1,14 @@
+#include "lib/tst_framework.bas"
+
+INIT("Testing TAB")
+
+f$=CHR(22,6,27,16,2,17,5,19,1,71) 'PRINT AT 6,27;"G"   - fine, so other control codes are not counted
+g$=CHR(22,7,10,17,0,23,31,0,32)   'PRINT AT 7,10; INK 0; TAB 31; " " last char is wrong. Should be a space
+'PRINT AT 8,31;"-"                 'to measure the wrong positions
+'PRINT a$;b$;c$;d$;e$;f$;g$
+PRINT f$;g$;
+'PRINT AT 10,28;"HI"               'fine at same coords
+'PRINT AT 2,0;"--"                 'to measure the wrong positions
+
+FINISH
+