Report option: false value is not supported.

Closes #399.

README.md

@@ -80,12 +80,12 @@ Default: `false`
 Parse a single expression, rather than a program (for parsing JSON)
 
 #### report
-Choices: `false, 'none', 'min'`, `'gzip'`
+Choices: `'none'`, `'min'`, `'gzip'`
 Default: `'min'`
 
 Either report only minification result or report minification and gzip results.
-This is useful to see exactly how well clean-css is performing but using `'gzip'` will make the task take 5-10x longer to complete. [Example output](https://github.com/sindresorhus/maxmin#readme).
-If false or 'none' is used the report will be generated on the verbose output.
+This is useful to see exactly how well UglifyJS is performing but using `'gzip'` will make the task take 5-10x longer to complete. [Example output](https://github.com/sindresorhus/maxmin#readme).
+If `'none'` is used the report will be generated on the verbose output.
 
 #### sourceMap
 Type: `Boolean`  
@@ -554,4 +554,4 @@ grunt.initConfig({
 
 Task submitted by ["Cowboy" Ben Alman](http://benalman.com)
 
-*This file was generated on Thu Apr 07 2016 15:29:35.*
+*This file was generated on Tue Jul 19 2016 10:15:13.*

docs/uglify-options.md

@@ -31,12 +31,12 @@ Default: `false`
 Parse a single expression, rather than a program (for parsing JSON)
 
 ## report
-Choices: `false, 'none', 'min'`, `'gzip'`
+Choices: `'none'`, `'min'`, `'gzip'`
 Default: `'min'`
 
 Either report only minification result or report minification and gzip results.
-This is useful to see exactly how well clean-css is performing but using `'gzip'` will make the task take 5-10x longer to complete. [Example output](https://github.com/sindresorhus/maxmin#readme).
-If false or 'none' is used the report will be generated on the verbose output.
+This is useful to see exactly how well UglifyJS is performing but using `'gzip'` will make the task take 5-10x longer to complete. [Example output](https://github.com/sindresorhus/maxmin#readme).
+If `'none'` is used the report will be generated on the verbose output.
 
 ## sourceMap
 Type: `Boolean`