Improve Ruby support in 'etags'

* lib-src/etags.c (Ruby_functions): Tag constants.  Don't tag
singleton classes.  Remove class qualifiers from tags generated
for method and constant names.  (Bug#22241)

* doc/emacs/maintaining.texi (Tag Syntax): Mention that constants
are tagged by etags in Ruby.

* etc/NEWS: Mention that constants are tagged by etags in Ruby.

* test/etags/ruby-src/test1.ruby: Add more tests.
* test/etags/ETAGS.good_1:
* test/etags/ETAGS.good_2:
* test/etags/ETAGS.good_3:
* test/etags/ETAGS.good_4:
* test/etags/ETAGS.good_5:
* test/etags/ETAGS.good_6:
* test/etags/CTAGS.good: Adapt to the changes in etags and in Ruby
tests.

1 files changed, 2 insertions, 2 deletions

diff --git a/etc/NEWS b/etc/NEWS
index af2dee931f3..78dce166b43 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -1830,8 +1830,8 @@ qualified names by hand.
 +++
 *** New language Ruby
 
-Names of modules, classes, methods, and functions are tagged.
-Overloaded operators are also tagged.
+Names of modules, classes, methods, functions, and constants are
+tagged.  Overloaded operators are also tagged.
 
 +++
 *** Improved support for Lua