-**☡ For compatibility with this program, source filenames must not
- contain Ascii whitespace, colons (`:`), pipes (`|`), bucks (`$`),
- percents (`%`) or control characters, and must not begin with a
- hyphen‐minus (`-`).**
+**☡ For compatibility with this program, source file·names must not
+ contain Ascii white·space, colons (`:`), semis (`;`), pipes (`|`),
+ bucks (`$`), percents (`%`), hashes (`#`), asterisks (`*`), brackets
+ (`[` or `]`), erotemes (`?`), backslashes (`\`), or control
+ characters, and must not begin with a hyphen‐minus (`-`).**