fix warnings for "warning: shadowing outer local variable - line"
side effect is that code starts to work again.

--- cvsspam-0.2.12/collect_diffs.rb~	2010-06-18 12:38:53.000000000 +0300
+++ cvsspam-0.2.12/collect_diffs.rb	2010-06-18 12:43:54.208238603 +0300
@@ -169,8 +169,7 @@
 
   raise "missing data dir (#{$tmpdir}/#{$dirtemplate}-XXXXXX)" if $datadir==nil
 
-  line = $stdin.gets
-  unless line =~ /^Update of (.+)/
+  unless $stdin.gets =~ /^Update of (.+)/
     fail "Log preamble looks suspect (doesn't start 'Update of ...')"
   end
 
@@ -189,11 +188,15 @@
   end
 
   # look for the start of the user's comment
+  got_log_message = false
   $stdin.each do |line|
-    break if line =~ /^Log Message/
+    if line =~ /^Log Message/
+        got_log_message = true
+        break
+    end
   end
 
-  unless line =~ /^Log Message/
+  unless got_log_message
     fail "Input did not contain a 'Log Message:' entry"
   end
 
@@ -282,12 +282,14 @@
         blah("about to run #{diff_cmd.join(' ')}")
         safer_popen(*diff_cmd) do |pipe|
           # skip over cvs-diff's preamble
-          pipe.each do |line|
-            break if line =~ /^diff /
+          line = nil
+          pipe.each do |l|
+            line = l
+            break if l =~ /^diff /
           end
           file.puts "#U #{line}"
-          pipe.each do |line|
-            file.puts "#U #{line}"
+          pipe.each do |l|
+            file.puts "#U #{l}"
           end
         end
       end