doc: use asciidoc attribute for date of docs (fix cmake warning)

CMake was displaying some warnings about a space in argument used for
asciidoc command:

  -a date=`date "+%F"`

Warning displayed:

CMake Warning (dev) in doc/en/CMakeLists.txt:
  Syntax Warning in cmake code at

    /path/to/doc/en/CMakeLists.txt:41:82

  Argument not separated from preceding token by whitespace.
This warning is for project developers.  Use -Wno-dev to suppress it.

2 files changed, 10 insertions, 10 deletions

diff --git a/doc/de/CMakeLists.txt b/doc/de/CMakeLists.txt
index 3b42f6a9e..b7233bddb 100644
--- a/doc/de/CMakeLists.txt
+++ b/doc/de/CMakeLists.txt
@@ -38,7 +38,7 @@ IF(ENABLE_DOC AND SOURCEHIGHLIGHT_FOUND)
   # user's guide
   ADD_CUSTOM_COMMAND(
     OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/weechat_user.de.html
-    COMMAND ${ASCIIDOC_EXECUTABLE} ARGS -a lang=de -a toc -a toclevels=4 -a date=`date "+%F"` -a revision="${VERSION}" -a stylesheet=${CMAKE_CURRENT_SOURCE_DIR}/../asciidoc.css -f ${CMAKE_CURRENT_SOURCE_DIR}/../asciidoc.conf -n -o ${CMAKE_CURRENT_BINARY_DIR}/weechat_user.de.html ${CMAKE_CURRENT_SOURCE_DIR}/weechat_user.de.txt
+    COMMAND ${ASCIIDOC_EXECUTABLE} ARGS -a lang=de -a toc -a toclevels=4 -a revision="${VERSION}" -a stylesheet=${CMAKE_CURRENT_SOURCE_DIR}/../asciidoc.css -f ${CMAKE_CURRENT_SOURCE_DIR}/../asciidoc.conf -n -o ${CMAKE_CURRENT_BINARY_DIR}/weechat_user.de.html ${CMAKE_CURRENT_SOURCE_DIR}/weechat_user.de.txt
     DEPENDS
     ${CMAKE_CURRENT_SOURCE_DIR}/weechat_user.de.txt
     ${CMAKE_CURRENT_SOURCE_DIR}/cmdline_options.de.txt
@@ -51,7 +51,7 @@ IF(ENABLE_DOC AND SOURCEHIGHLIGHT_FOUND)
   # scripting guide
   ADD_CUSTOM_COMMAND(
     OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/weechat_scripting.de.html
-    COMMAND ${ASCIIDOC_EXECUTABLE} ARGS -a lang=de -a toc -a toclevels=3 -a date=`date "+%F"` -a revision="${VERSION}" -a stylesheet=${CMAKE_CURRENT_SOURCE_DIR}/../asciidoc.css -n -o ${CMAKE_CURRENT_BINARY_DIR}/weechat_scripting.de.html ${CMAKE_CURRENT_SOURCE_DIR}/weechat_scripting.de.txt
+    COMMAND ${ASCIIDOC_EXECUTABLE} ARGS -a lang=de -a toc -a toclevels=3 -a revision="${VERSION}" -a stylesheet=${CMAKE_CURRENT_SOURCE_DIR}/../asciidoc.css -f ${CMAKE_CURRENT_SOURCE_DIR}/../asciidoc.conf -n -o ${CMAKE_CURRENT_BINARY_DIR}/weechat_scripting.de.html ${CMAKE_CURRENT_SOURCE_DIR}/weechat_scripting.de.txt
     DEPENDS
     ${CMAKE_CURRENT_SOURCE_DIR}/weechat_scripting.de.txt
     COMMENT "Building weechat_scripting.de.html"
@@ -62,7 +62,7 @@ IF(ENABLE_DOC AND SOURCEHIGHLIGHT_FOUND)
   # FAQ
   ADD_CUSTOM_COMMAND(
     OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/weechat_faq.de.html
-    COMMAND ${ASCIIDOC_EXECUTABLE} ARGS -a lang=de -a toc -a date=`date "+%F"` -a revision="${VERSION}" -a stylesheet=${CMAKE_CURRENT_SOURCE_DIR}/../asciidoc.css -f ${CMAKE_CURRENT_SOURCE_DIR}/../asciidoc.conf -n -o ${CMAKE_CURRENT_BINARY_DIR}/weechat_faq.de.html ${CMAKE_CURRENT_SOURCE_DIR}/weechat_faq.de.txt
+    COMMAND ${ASCIIDOC_EXECUTABLE} ARGS -a lang=de -a toc -a revision="${VERSION}" -a stylesheet=${CMAKE_CURRENT_SOURCE_DIR}/../asciidoc.css -f ${CMAKE_CURRENT_SOURCE_DIR}/../asciidoc.conf -n -o ${CMAKE_CURRENT_BINARY_DIR}/weechat_faq.de.html ${CMAKE_CURRENT_SOURCE_DIR}/weechat_faq.de.txt
     DEPENDS
     ${CMAKE_CURRENT_SOURCE_DIR}/weechat_faq.de.txt
     COMMENT "Building weechat_faq.de.html"
@@ -73,7 +73,7 @@ IF(ENABLE_DOC AND SOURCEHIGHLIGHT_FOUND)
   # quickstart
   ADD_CUSTOM_COMMAND(
     OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/weechat_quickstart.de.html
-    COMMAND ${ASCIIDOC_EXECUTABLE} ARGS -a lang=de -a toc -a date=`date "+%F"` -a revision="${VERSION}" -a stylesheet=${CMAKE_CURRENT_SOURCE_DIR}/../asciidoc.css -n -o ${CMAKE_CURRENT_BINARY_DIR}/weechat_quickstart.de.html ${CMAKE_CURRENT_SOURCE_DIR}/weechat_quickstart.de.txt
+    COMMAND ${ASCIIDOC_EXECUTABLE} ARGS -a lang=de -a toc -a revision="${VERSION}" -a stylesheet=${CMAKE_CURRENT_SOURCE_DIR}/../asciidoc.css -f ${CMAKE_CURRENT_SOURCE_DIR}/../asciidoc.conf -n -o ${CMAKE_CURRENT_BINARY_DIR}/weechat_quickstart.de.html ${CMAKE_CURRENT_SOURCE_DIR}/weechat_quickstart.de.txt
     DEPENDS
     ${CMAKE_CURRENT_SOURCE_DIR}/weechat_quickstart.de.txt
     COMMENT "Building weechat_quickstart.de.html"
@@ -84,7 +84,7 @@ IF(ENABLE_DOC AND SOURCEHIGHLIGHT_FOUND)
   # tester's guide
   ADD_CUSTOM_COMMAND(
     OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/weechat_tester.de.html
-    COMMAND ${ASCIIDOC_EXECUTABLE} ARGS -a lang=de -a toc -a date=`date "+%F"` -a revision="${VERSION}" -a stylesheet=${CMAKE_CURRENT_SOURCE_DIR}/../asciidoc.css -n -o ${CMAKE_CURRENT_BINARY_DIR}/weechat_tester.de.html ${CMAKE_CURRENT_SOURCE_DIR}/weechat_tester.de.txt
+    COMMAND ${ASCIIDOC_EXECUTABLE} ARGS -a lang=de -a toc -a revision="${VERSION}" -a stylesheet=${CMAKE_CURRENT_SOURCE_DIR}/../asciidoc.css -f ${CMAKE_CURRENT_SOURCE_DIR}/../asciidoc.conf -n -o ${CMAKE_CURRENT_BINARY_DIR}/weechat_tester.de.html ${CMAKE_CURRENT_SOURCE_DIR}/weechat_tester.de.txt
     DEPENDS
     ${CMAKE_CURRENT_SOURCE_DIR}/weechat_tester.de.txt
     COMMENT "Building weechat_tester.de.html"
diff --git a/doc/de/Makefile.am b/doc/de/Makefile.am
index a5b5a558d..b85bbd79e 100644
--- a/doc/de/Makefile.am
+++ b/doc/de/Makefile.am
@@ -54,23 +54,23 @@ weechat.1: weechat.1.de.txt cmdline_options.de.txt
 
 # user's guide
 weechat_user.de.html: weechat_user.de.txt cmdline_options.de.txt $(wildcard autogen/user/*.txt)
-	$(ASCIIDOC) -a lang=de -a toc -a toclevels=4 -a date=`date "+%F"` -a revision="$(VERSION)" -a stylesheet=$(abs_top_srcdir)/doc/asciidoc.css -f $(abs_top_srcdir)/doc/asciidoc.conf -n -o weechat_user.de.html $(abs_top_srcdir)/doc/de/weechat_user.de.txt
+	$(ASCIIDOC) -a lang=de -a toc -a toclevels=4 -a revision="$(VERSION)" -a stylesheet=$(abs_top_srcdir)/doc/asciidoc.css -f $(abs_top_srcdir)/doc/asciidoc.conf -n -o weechat_user.de.html $(abs_top_srcdir)/doc/de/weechat_user.de.txt
 
 # scripting guide
 weechat_scripting.de.html: weechat_scripting.de.txt
-	$(ASCIIDOC) -a lang=de -a toc -a toclevels=3 -a date=`date "+%F"` -a revision="$(VERSION)" -a stylesheet=$(abs_top_srcdir)/doc/asciidoc.css -n -o weechat_scripting.de.html $(abs_top_srcdir)/doc/de/weechat_scripting.de.txt
+	$(ASCIIDOC) -a lang=de -a toc -a toclevels=3 -a revision="$(VERSION)" -a stylesheet=$(abs_top_srcdir)/doc/asciidoc.css -f $(abs_top_srcdir)/doc/asciidoc.conf -n -o weechat_scripting.de.html $(abs_top_srcdir)/doc/de/weechat_scripting.de.txt
 
 # FAQ
 weechat_faq.de.html: weechat_faq.de.txt
-	$(ASCIIDOC) -a lang=de -a toc -a date=`date "+%F"` -a revision="$(VERSION)" -a stylesheet=$(abs_top_srcdir)/doc/asciidoc.css -f $(abs_top_srcdir)/doc/asciidoc.conf -n -o weechat_faq.de.html $(abs_top_srcdir)/doc/de/weechat_faq.de.txt
+	$(ASCIIDOC) -a lang=de -a toc -a revision="$(VERSION)" -a stylesheet=$(abs_top_srcdir)/doc/asciidoc.css -f $(abs_top_srcdir)/doc/asciidoc.conf -n -o weechat_faq.de.html $(abs_top_srcdir)/doc/de/weechat_faq.de.txt
 
 # quickstart
 weechat_quickstart.de.html: weechat_quickstart.de.txt
-	$(ASCIIDOC) -a lang=de -a toc -a date=`date "+%F"` -a revision="$(VERSION)" -a stylesheet=$(abs_top_srcdir)/doc/asciidoc.css -n -o weechat_quickstart.de.html $(abs_top_srcdir)/doc/de/weechat_quickstart.de.txt
+	$(ASCIIDOC) -a lang=de -a toc -a revision="$(VERSION)" -a stylesheet=$(abs_top_srcdir)/doc/asciidoc.css -f $(abs_top_srcdir)/doc/asciidoc.conf -n -o weechat_quickstart.de.html $(abs_top_srcdir)/doc/de/weechat_quickstart.de.txt
 
 # tester's guide
 weechat_tester.de.html: weechat_tester.de.txt
-	$(ASCIIDOC) -a lang=de -a toc -a date=`date "+%F"` -a revision="$(VERSION)" -a stylesheet=$(abs_top_srcdir)/doc/asciidoc.css -n -o weechat_tester.de.html $(abs_top_srcdir)/doc/de/weechat_tester.de.txt
+	$(ASCIIDOC) -a lang=de -a toc -a revision="$(VERSION)" -a stylesheet=$(abs_top_srcdir)/doc/asciidoc.css -f $(abs_top_srcdir)/doc/asciidoc.conf -n -o weechat_tester.de.html $(abs_top_srcdir)/doc/de/weechat_tester.de.txt
 
 # install man/docs