[Ohrrpgce] SVN: teeemcee/12957 Add expect_exists & success args to read_file, string_from_file; rewrite

[subversion at HamsterRepublic.com]

teeemcee
2022-05-07 20:16:14 -0700 (Sat, 07 May 2022)
249
Add expect_exists & success args to read_file, string_from_file; rewrite string_{from,to}_file

Rewrote them as one line of code each, in fact. string_from_file no longer trims
whitespace from the end of each line, and defaults to expect_exists=YES.
---
U   wip/util.bas
U   wip/util.bi