Stop using a regexp that causes a false warning.

* lib/abbrev.rb (Abbrev#abbrev): Stop using a regexp that causes a
  false warning. [Bug #7471]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38028 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 4 deletions

diff --git a/lib/abbrev.rb b/lib/abbrev.rb
index 443ab6d8f1..d4f8196f49 100644..100755
--- a/lib/abbrev.rb
+++ b/lib/abbrev.rb
@@ -73,9 +73,9 @@ module Abbrev
     end
 
     words.each do |word|
-      next if (abbrev = word).empty?
-      while (len = abbrev.rindex(/[\w\W]\z/)) > 0
-        abbrev = word[0,len]
+      next if word.empty?
+      word.size.downto(1) { |len|
+        abbrev = word[0...len]
 
         next if pattern && pattern !~ abbrev
 
@@ -87,7 +87,7 @@ module Abbrev
         else
           break
         end
-      end
+      }
     end
 
     words.each do |word|