tal/str: always create strings which have tal_count() == strlen() + 1.
[ccan] / ccan / tal / str / test /
drwxr-xr-x   ..
-rw-r--r-- 543 helper.h
-rw-r--r-- 500 run-fmt-terminate.c
-rw-r--r-- 2537 run-string.c
-rw-r--r-- 470 run-strndup.c
-rw-r--r-- 3808 run-strreg.c
-rw-r--r-- 999 run-take.c
-rw-r--r-- 5303 run.c