[beast: 3/8] DOCS: strip spaces from DOXYGEN_TAGFILES

[Tim Janik <timj src gnome org>]

commit af5479d39a66051f640e74597ac040e590b3a1fe
Author: Tim Janik <timj gnu org>
Date:   Thu Aug 27 02:04:21 2015 +0200

    DOCS: strip spaces from DOXYGEN_TAGFILES

 docs/Makefile.am |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/docs/Makefile.am b/docs/Makefile.am
index 9a2d6e7..bcd2fc5 100644
--- a/docs/Makefile.am
+++ b/docs/Makefile.am
@@ -56,8 +56,10 @@ DOXYGEN_CHANGELOG       = ChangeLog.tmp
 DOXYGEN_CHANGELOG_TITLE = "Development Changes"
 DOXYGEN_NEWS           = $(top_srcdir)/NEWS
 DOXYGEN_PROJECT_LINK    = http://beast.testbit.eu/
-DOXYGEN_TAGFILES        = imports/tagfile-rapicorn.xml=http://dev.testbit.eu/rapicorn/latest/ \
-                         imports/tagfile-susv4.xml=http://pubs.opengroup.org/onlinepubs/9699919799/
+DOXYGEN_TAGFILES        = $(strip \
+       imports/tagfile-rapicorn.xml=http://dev.testbit.eu/rapicorn/latest/             \
+       imports/tagfile-susv4.xml=http://pubs.opengroup.org/onlinepubs/9699919799/      \
+)
 build-docs: doxygen-check
        $(Q) $(MAKE) $(AM_MAKEFLAGS) --no-print-directory doxygen-clean
        $(QPRINT) "GEN" "Documentation Sources"