doc: PKGBUILD.5 - fix output of bzr command

Add quotes around 'bzr help revisionspec' to make it clearer that
this is a command to be run.

Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/doc/PKGBUILD.5.txt b/doc/PKGBUILD.5.txt
index 0dca4a2d..19bae634 100644
--- a/doc/PKGBUILD.5.txt
+++ b/doc/PKGBUILD.5.txt
@@ -428,7 +428,7 @@ The source URL is divided into three components:
 	the VCS being used:
 
 	*bzr*;;
-		revision (see `bzr help revisionspec` for details)
+		revision (see `'bzr help revisionspec'` for details)
 
 	*git*;;
 		branch, commit, tag