Readme.md: update

Readme.md

@@ -14,7 +14,7 @@ To install borg, you can go to [borg's installation page](https://borgbackup.rea
 
 As gblk is written in rust, you need to install it with:
 
-```bash
+```sh
 curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
 ```
 
@@ -409,7 +409,7 @@ Note that you can also display the differences between images. To be able to do
 so, [imagemagick](https://imagemagick.org/script/index.php) must be installed.
 
 
-You you plan to make pdf diff, you might want to change imagemagick `/etc/ImageMagick-[VERSION]/policy.xml` and replacing the line:
+If you plan to make pdf diff, you might want to change imagemagick `/etc/ImageMagick-[VERSION]/policy.xml` and replacing the line:
 
 ```xml
 <policy domain="coder" rights="none" pattern="PDF" />
@@ -489,17 +489,17 @@ Note that this command doesn't actually free disk space. You have to use `gblk c
 
 To display the help of gblk delete, run the following command:
 
-```
+```bash
 gblk delete -h # -h for compact help, --help for a more exhaustive help
 ```
 
 To see what archive you are about to remove, enter
 
-```
+```sh
 gblk delete --list --dry-run [OTHER_OPTIONS]
 ```
 
-- The `dry-run` option will keep the archive unchanged
+- The `--dry-run` option will keep the archive unchanged
 - The `--list` option will display what was deleted (without `--dry-run` option) or what would be deleted (with the `dry-run` option)
 
 # Prune command
@@ -514,13 +514,13 @@ Note that this command doesn't actually free disk space. You have to use `gblk c
 
 To display the help of `gblk prune`, run the following command:
 
-```
+```sh
 gblk prune -h # -h for compact help, --help for a more exhaustive help
 ```
 
 To see what archives you are about to remove, enter
 
-```
+```sh
 gblk prune --list --dry-run [OTHER_OPTIONS]
 ```
 
@@ -533,13 +533,13 @@ You can use this command after deleting one or more archives because it will rea
 
 To use this command, you can run:
 
-```
+```sh
 gblk compact  # -h for compact help, --help for a more exhaustive help
 ```
 
 To compact you `.borg` folder, you can run
 
-```
+```sh
 gblk compact --verbose
 ```
 
@@ -603,7 +603,7 @@ keep_monthly = 5
 
 To remove a setting previouly defined in the local configuration file you can enter the following command
 
-```
+```sh
 gblk config rm <KEY> [--global]
 ```