Update README

README.md

@@ -2,7 +2,7 @@
 
 Brakeman is a static analysis tool which checks Ruby on Rails applications for security vulnerabilities.
 
-It targets Rails versions > 2.0 and < 3.0.
+It targets Rails versions > 2.0 with experimental support for Rails 3.x
 
 # Installation
 
@@ -25,7 +25,7 @@ To specify an output file for the results:
 
     brakeman -o output_file app_path
 
-The output format is determined by the file extension or by using the `-f` option. Current options are: `text`, `html`, and `csv`.
+The output format is determined by the file extension or by using the `-f` option. Current options are: `text`, `html`, `csv`, and `tabs`.
 
 To suppress informational warnings and just output the report:
 
@@ -51,7 +51,7 @@ To indicate certain methods are "safe":
 
     brakeman -s benign_method,totally_safe app_path
 
-By default, brakeman will assume that unknown methods involving untrusted data are dangerous. For example, this would a warning:
+By default, brakeman will assume that unknown methods involving untrusted data are dangerous. For example, this would cause a warning (Rails 2):
 
     <%= some_method(:option => params[:input]) %>
 
@@ -81,7 +81,7 @@ To only get warnings above a given confidence level:
 
     brakeman -w3 app_path
 
-The `-w` switch takes a number from 1 to 3, with 1 being low (all warnings) and 3 being high (only high confidence warnings).
+The `-w` switch takes a number from 1 to 3, with 1 being low (all warnings) and 3 being high (only highest confidence warnings).
 
 # Configuration files