ovsdb-doc: Convert '-' preceding a number as a minus sign, not a hyphen.

ovs-vswitchd.conf.db.5 contains the following sentence:

   If the interface cannot be added then Open vSwitch sets this column
   to -1.

The '-' in "-1" should be a minus sign, not a hyphen, but the heuristic
in ovsdb-doc wasn't smart enough.  This commit improves the heuristic and
fixes the problem.

Found by lintian.

Reported-by: Thomas Goirand <zigo@debian.org>
Reviewed-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Ben Pfaff <blp@nicira.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/ovsdb/ovsdb-doc.in b/ovsdb/ovsdb-doc.in
index 8e0e1718..7d257c15 100755
--- a/ovsdb/ovsdb-doc.in
+++ b/ovsdb/ovsdb-doc.in
@@ -16,9 +16,9 @@ argv0 = sys.argv[0]
 def textToNroff(s, font=r'\fR'):
     def escape(match):
         c = match.group(0)
-        if c == '-':
-            if font == r'\fB':
-                return r'\-'
+        if c.startswith('-'):
+            if c != '-' or font == r'\fB':
+                return '\\' + c
             else:
                 return '-'
         if c == '\\':
@@ -31,7 +31,7 @@ def textToNroff(s, font=r'\fR'):
             raise error.Error("bad escape")
 
     # Escape - \ " ' as needed by nroff.
-    s = re.sub('([-"\'\\\\])', escape, s)
+    s = re.sub('(-[0-9]|[-"\'\\\\])', escape, s)
     if s.startswith('.'):
         s = '\\' + s
     return s