Initial for sdiff

Author: Gunter Schmidt

Cargo.toml

@@ -16,6 +16,7 @@ path = "src/main.rs"
 
 [dependencies]
 chrono = "0.4.38"
+const_format = "0.2.35"
 diff = "0.1.13"
 itoa = "1.0.11"
 regex = "1.10.4"
@@ -45,4 +46,5 @@ lto = "thin"
 # default = ["cmp_bytes_limit_128_bit"]
 # allows to set the --bytes limit from u64 to u128, if limits larger than Exabyte are required. 
 cmp_bytes_limit_128_bit = []
-
+# instead of limiting to KiB, MiB, etc, one can write kib, mib, Mb or whatever case.
+allow_case_insensitive_byte_units = []