`crayon` tests run with `fansi` string manip funs

testthat.Rout

── 1. Failure: col_substr keeps color (@test-operations.R#31)  ─────────────────
col_substr("\033[31mred\033[39m", 1, 1) not equal to "\033[31mr\033[39m".
1/1 mismatches
x[1]: "\033[31mr\033[0m"
y[1]: "\033[31mr\033[39m"

── 2. Failure: col_substr keeps color (@test-operations.R#33)  ─────────────────
col_substr("foo\033[31mred\033[39m", 4, 4) not equal to "\033[31mr\033[39m".
1/1 mismatches
x[1]: "\033[31mr\033[0m"
y[1]: "\033[31mr\033[39m"

── 3. Failure: col_substr keeps color (@test-operations.R#35)  ─────────────────
col_substr("foo\033[31mred\033[39mbar", 4, 4) not equal to "\033[31mr\033[39m".
1/1 mismatches
x[1]: "\033[31mr\033[0m"
y[1]: "\033[31mr\033[39m"

── 4. Failure: col_substr keeps color (@test-operations.R#37)  ─────────────────
col_substr(...) not equal to "\033[31m\033[39m\033[31mr\033[39m".
1/1 mismatches
x[1]: "\033[31mr\033[0m"
y[1]: "\033[31m\033[39m\033[31mr\033[39m"

── 5. Failure: col_substr corner cases (@test-operations.R#87)  ────────────────
`col_substr("abc", "hello", 1)` did not throw an error.

── 6. Failure: col_strsplit (@test-operations.R#139)  ──────────────────────────
col_strsplit(str, "e") not equal to list(c("\033[31mr\033[39m", "\033[31md\033[39m-plain")).
Component 1: 1 string mismatch

── 7. Failure: Weird length 'split' (@test-operations.R#189)  ──────────────────
`col_strsplit(c("ab", "bd"), c("b", "d"))` did not throw an error.

══ testthat results  ═══════════════════════════════════════════════════════════
OK: 540 SKIPPED: 2 FAILED: 7