Implement user option ruby-align-chained-calls

* lisp/progmodes/ruby-mode.el (ruby-align-chained-calls): New option.
(ruby-smie-grammar): Make "." right-associative.  Make its priority
lower than the ternary and all binary operators.
(ruby-smie-rules): Indent "(" relative to the first non-"."
parent, or the first "." parent at indentation.  Use
`ruby-align-chained-calls' for indentation of "." tokens.

* test/automated/ruby-mode-tests.el (ruby-align-chained-calls):
New test.

Fixes: debbugs:16593

1 files changed, 4 insertions, 4 deletions

diff --git a/test/indent/ruby.rb b/test/indent/ruby.rb
index a0116fef18e..49ed92f8fdc 100644
--- a/test/indent/ruby.rb
+++ b/test/indent/ruby.rb
@@ -257,8 +257,8 @@ foo ^
   bar
 
 foo_bar_tee(1, 2, 3)
-  .qux
-  .bar
+  .qux.bar
+  .tee
 
 foo do
   bar
@@ -338,7 +338,7 @@ end
 %^abc^
 ddd
 
-qux = foo ?
+qux = foo.fee ?
         bar :
         tee
 
@@ -348,7 +348,7 @@ zoo.keep.bar!(
 
 zoo
   .lose(
-  q, p)
+    q, p)
 
 foo(bar:
       tee)