[Automake-NG] [FYI Merge branch 'master' into ng/master

[Stefano Lattarini]

commit 9b183694a14f5eb93c1aee0d1fb5dcc7c7acbd30
Merge: 00395d4 df3490b
Author: Stefano Lattarini <address@hidden>
Date:   Tue May 7 15:27:21 2013 +0200

    Merge branch 'master' into ng/master

    * master:
      docs: fix warnings given by Texinfo 5.x
      fixlet: remove leftover comment fragment
      master branch: we are going to become Automake 2.0
      maint branch: we are going to become Automake 1.14
      maint: version bump after beta release 1.13.1d
      release: beta release 1.13.1d (will become 1.13.2)
      NEWS: document more robust handling/recognition of make options
      tests: typofixes in comments in t/preproc-c-compile.sh
      tests: remove bashism from a test
      maint: targets and recipes to simplify testing on real-world packages
      build: preparatory refactoring
      build: tiny reduction in code duplication
      make flags analysis: handle more options with args
      make flags analysis: use simpler variable names
      make flags analysis: whitespace changes
      make flags analysis: embed in a subshell
      make flags analysis: be more robust
      make flags analysis: cater to GNU make 3.83 (still unreleased as of now)
      tests: expose weaknesses in make flags analysis
      tests: improve debugging output in checks on make flags analysis
      make flags analysis: refactor, to reduce code duplication
      tests: avoid one tricky use of "make -e"
      cosmetics: remove few trailing whitespace occurrences
      typofix: in NEWS (extra whitespace)
      compat: substitute '@mkdir_p@' as '$(MKDIR_P)' unconditionally
      tests: avoid a spurious error with Solaris make
      subdirs: don't return false positives for the '-k' option's presence
      header-vars: recognize more make flags ('-k' in particular)
      header-vars: simplify how make flags are determined
      tests: remove dead code from t/make-dryrun.tap
      header-vars: new variable $(am__running_with_option)
      tests: expose bug#12554 (false positives for presence of '-k' make option)

    Signed-off-by: Stefano Lattarini <address@hidden>