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Diffstat (limited to '')
| -rw-r--r-- | man/deb-substvars.pod | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/man/deb-substvars.pod b/man/deb-substvars.pod index c6fca29..3a0cc28 100644 --- a/man/deb-substvars.pod +++ b/man/deb-substvars.pod @@ -54,11 +54,14 @@ is rescanned to look for more substitutions. =head2 File Syntax Substitution variables can be specified in a file. -These files consist of lines of the form I<name>B<=>I<value> or -I<name>B<?=>I<value>. -The B<=> operator assigns a normal substitution variable, while the B<?=> -operator (since dpkg 1.21.8) assigns an optional substitution variable -which will emit no warnings even if unused. +These files consist of lines of the form I<name>B<=>I<value>, +I<name>B<?=>I<value>, or +I<name>B<!=>I<value>. +The B<=> operator assigns a normal substitution variable, +the B<?=> operator (since dpkg 1.21.8) assigns an optional substitution +variable which will emit no warnings even if unused, +and the B<!=> operator (since dpkg 1.22.7) assigns a required substitution +variable which will error out if unused. Trailing whitespace on each line, blank lines, and lines starting with a B<#> symbol (comments) are ignored. |