manpage: Add escaping for hyphen used as minus

As pointed out by Debian lintian, options with '-' might not be
copy/pastable if formatted with an unescaped '-' character.

diff --git a/notmuch.1 b/notmuch.1
index 2c33749767392ccae25be03be645bc01c4561035..e4eed60fc95e5f828f940b4efda1a094f34c3180 100644 (file)
--- a/notmuch.1
+++ b/notmuch.1
@@ -169,31 +169,31 @@ the authors of the thread and the subject.
 .B threads
 
 Output the thread IDs of all threads with any message matching the
 .B threads
 
 Output the thread IDs of all threads with any message matching the

-search terms, either one per line (--format=text) or as a JSON array
-(--format=json).
+search terms, either one per line (\-\-format=text) or as a JSON array
+(\-\-format=json).

 .RE
 .RS 4
 .TP 4
 .B messages
 
 Output the message IDs of all messages matching the search terms,
 .RE
 .RS 4
 .TP 4
 .B messages
 
 Output the message IDs of all messages matching the search terms,

-either one per line (--format=text) or as a JSON array
-(--format=json).
+either one per line (\-\-format=text) or as a JSON array
+(\-\-format=json).

 .RE
 .RS 4
 .TP 4
 .B files
 
 Output the filenames of all messages matching the search terms, either
 .RE
 .RS 4
 .TP 4
 .B files
 
 Output the filenames of all messages matching the search terms, either

-one per line (--format=text) or as a JSON array (--format=json).
+one per line (\-\-format=text) or as a JSON array (\-\-format=json).

 .RE
 .RS 4
 .TP 4
 .B tags
 
 Output all tags that appear on any message matching the search terms,
 .RE
 .RS 4
 .TP 4
 .B tags
 
 Output all tags that appear on any message matching the search terms,

-either one per line (--format=text) or as a JSON array
-(--format=json).
+either one per line (\-\-format=text) or as a JSON array
+(\-\-format=json).

 .RE
 .RE
 
 .RE
 .RE