Merge branch 'release'

Changes from 0.28.3

diff --combined NEWS
index 2a69b0be5206bf8d59b0057d53888999dd84a4b6,549b1840a8cf0306b0a02f0f00571bfca521dd5f..9fcb57edc3d3c830cdc9176e6148b7a77d40f12e
--- 1/NEWS
--- 2/NEWS
+++ b/NEWS
@@@ -1,12 -1,17 +1,26 @@@
 +Notmuch 0.29 (UNRELEASED)
 +=========================
 +
 +Command Line Interface
 +----------------------
 +
 +`notmuch show` now supports --body=false and --include-html with
 +--format=text
 +
+ Notmuch 0.28.3 (2019-03-05)
+ ===========================
+ 
+ Library
+ -------
+ 
+ Fix a bug with the internal data structure _notmuch_string_map_t used
+ by message properties.
+ 
+ Build System
+ ------------
+ 
+ Serialize calls to sphinx-build to avoid race condition.
+ `
  Notmuch 0.28.2 (2019-02-17)
  ===========================
  

diff --combined doc/Makefile.local
index f53b3702fb9dc8ca175605ad64056520ffd680ff,cb0f1f6488f6d9cbe0e3e8d345c5d90053c2de9c..bab3d0d286ce75efe68433b3a8c82ab87eac7dd6
--- 1/doc/Makefile.local
--- 2/doc/Makefile.local
+++ b/doc/Makefile.local
@@@ -37,10 -37,14 +37,18 @@@ INFO_INFO_FILES := $(INFO_TEXI_FILES:.t
  %.gz: %
        rm -f $@ && gzip --stdout $^ > $@
  
 +ifeq ($(WITH_EMACS),1)
 +$(DOCBUILDDIR)/.roff.stamp sphinx-html sphinx-texinfo: docstring.stamp
 +endif
 +
+ # Sequentialize the calls to sphinx-build to avoid races with
+ # reading/writing cached state. This uses GNU make specific
+ # "order-only" prerequisites.
+ 
+ sphinx-html: | $(DOCBUILDDIR)/.roff.stamp
+ sphinx-texinfo: | sphinx-html
+ sphinx-info: | sphinx-texinfo
+ 
  sphinx-html:
        $(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(DOCBUILDDIR)/html