Merge pull request #61 from Dev380/dry-run

Document new `--dry-run` flag

Author: mgrachev

docs/usage/fix.md

@@ -26,6 +26,26 @@ Fixing .env
 All warnings are fixed. Total: 2
 ```
 
+#### Dry run
+
+If you want to run `fix` without modifying any files on disk, use the `--dry-run` flag.
+
+```bash
+$ dotenv-linter fix --dry-run
+Fixing .env
+Dry run - not changing any files on disk.
+
+BAR=bar_example_one
+# BAR=bar_example_two
+FOO=foo_example
+
+
+.env:2 DuplicatedKey: The BAR key is duplicated
+.env:3 LowercaseKey: The foo key should be in uppercase
+
+All warnings are fixed. Total: 2
+```
+
 #### Addition arguments
 
 In addition, the `fix` command supports the following list of arguments:

docs/whats_new/v331.md

@@ -6,6 +6,10 @@ Here's an overview of the key changes included in this release.
 
 PR: [#757](https://github.com/dotenv-linter/dotenv-linter/pull/757) ([@harryzcy](https://github.com/harryzcy))
 
+### 2. Add `--dry-run` option to the "fix" subcommand
+
+PR: [#772](https://github.com/dotenv-linter/dotenv-linter/pull/772) ([@Dev380](https://github.com/Dev380))
+
 These are all the key changes that are included in the new [v3.3.1](https://github.com/dotenv-linter/dotenv-linter/releases/tag/v3.2.0) release.<br/>
 Thanks to everyone who contributed 🙏