fix warnings: ambiguous first arg

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Library/Homebrew/download_strategy.rb

@@ -192,7 +192,7 @@ class SubversionDownloadStrategy <AbstractDownloadStrategy
 
   def get_externals
     `'#{shell_quote(svn)}' propget svn:externals '#{shell_quote(@url)}'`.chomp.each_line do |line|
-      name, url = line.split /\s+/
+      name, url = line.split(/\s+/)
       yield name, url
     end
   end

Library/Homebrew/extend/ENV.rb

@@ -79,27 +79,27 @@ module HomebrewEnvExtension
 
   # recommended by Apple, but, eg. wget won't compile with this flag, so…
   def fast
-    remove_from_cflags /-O./
+    remove_from_cflags(/-O./)
     append_to_cflags '-fast'
   end
   def O4
     # LLVM link-time optimization
-    remove_from_cflags /-O./
+    remove_from_cflags(/-O./)
     append_to_cflags '-O4'
   end
   def O3
     # Sometimes O4 just takes fucking forever
-    remove_from_cflags /-O./
+    remove_from_cflags(/-O./)
     append_to_cflags '-O3'
   end
   def O2
     # Sometimes O3 doesn't work or produces bad binaries
-    remove_from_cflags /-O./
+    remove_from_cflags(/-O./)
     append_to_cflags '-O2'
   end
   def Os
     # Sometimes you just want a small one
-    remove_from_cflags /-O./
+    remove_from_cflags(/-O./)
     append_to_cflags '-Os'
   end
 

Library/Homebrew/extend/pathname.rb

@@ -156,7 +156,7 @@ class Pathname
 
     # eg. otp_src_R13B (this is erlang's style)
     # eg. astyle_1.23_macosx.tar.gz
-    stem.scan /_([^_]+)/ do |match|
+    stem.scan(/_([^_]+)/) do |match|
       return match.first if /\d/.match $1
     end
 

Library/Homebrew/extend/string.rb

@@ -1,5 +1,5 @@
 class String
   def undent
-    gsub /^.{#{slice(/^ +/).length}}/, ''
+    gsub(/^.{#{slice(/^ +/).length}}/, '')
   end
 end