Prefer Dir[] to Dir.glob when not passing a block

Formula/boost.rb

@@ -172,7 +172,7 @@ class Boost < Formula
     s = ''
     # ENV.compiler doesn't exist in caveats. Check library availability
     # instead.
-    if Dir.glob("#{lib}/libboost_log*").empty?
+    if Dir["#{lib}/libboost_log*"].empty?
       s += <<-EOS.undent
 
       Building of Boost.Log is disabled because it requires newer GCC or Clang.

Formula/geoip.rb

@@ -52,7 +52,7 @@ class Geoip < Formula
 
     # Since default data directory moved, copy existing DBs
     legacy_data = Pathname.new "#{HOMEBREW_PREFIX}/share/GeoIP"
-    cp Dir.glob("#{legacy_data}/*"), geoip_data if legacy_data.exist?
+    cp Dir["#{legacy_data}/*"], geoip_data if legacy_data.exist?
 
     ["City", "Country"].each do |type|
       full = Pathname.new "#{geoip_data}/GeoIP#{type}.dat"

Formula/python3.rb

@@ -111,9 +111,7 @@ class Python3 < Formula
     system "make", "quicktest" if build.include? "quicktest"
 
     # Any .app get a " 3" attached, so it does not conflict with python 2.x.
-    Dir.glob(prefix/"*.app").each do |app|
-      mv app, app.gsub(".app", " 3.app")
-    end
+    Dir.glob("#{prefix}/*.app") { |app| mv app, app.sub(".app", " 3.app") }
 
     # A fix, because python and python3 both want to install Python.framework
     # and therefore we can't link both into HOMEBREW_PREFIX/Frameworks