Fix Readme errors on flag name

README.md

@@ -35,7 +35,7 @@ It will download the last version of every file present on Wayback Machine to `.
   Default is ./websites/ plus the domain name
   -f, --from TIMESTAMP Only files on or after timestamp supplied (ie. 20060716231334)
   -t, --to TIMESTAMP Only files on or before timestamp supplied (ie. 20100916231334)
-  -e, --exact_url Download only the url provied and not the full site
+  -e, --exact-url Download only the url provied and not the full site
   -o, --only ONLY_FILTER Restrict downloading to urls that match this filter
   (use // notation for the filter to be treated as a regex)
   -x, --exclude EXCLUDE_FILTER Skip downloading of urls that match this filter
@@ -47,9 +47,6 @@ It will download the last version of every file present on Wayback Machine to `.
   Count an average of 150,000 snapshots per page
   -l, --list Only list file urls in a JSON format with the archived timestamps, won't download anything
   -v, --version Display version
-
-
-
   
 ## Specify directory to save files to
 
@@ -85,13 +82,13 @@ Example:
 
 ## Exact Url
 
- -e, --exact_url 
+ -e, --exact-url 
 
 Optional. If you want to retrieve only the file matching exactly the url provided, you can use this flag. It will avoid downloading anything else.
 
 For example, if you only want to download only the html homepage file of example.com:
 
- wayback_machine_downloader https://example.com --exact_url 
+ wayback_machine_downloader https://example.com --exact-url 
 
 
 ## Only URL Filter