added new docs

README.md

@@ -44,6 +44,7 @@ auto-editor example.mp4 --frame_margin 8
  - [How to Install Auto-Editor](https://github.com/WyattBlue/auto-editor/blob/master/articles/installing.md)
  - [How to Edit Videos With Auto-Editor](https://github.com/WyattBlue/auto-editor/blob/master/articles/editing.md)
  - [How to Use Motion Detection in Auto-Editor](https://github.com/WyattBlue/auto-editor/blob/master/articles/motionDetection.md)
+ - [`--cut_out`, `--ignore`, and Range Syntax](https://github.com/WyattBlue/auto-editor/blob/master/articles/rangeSyntax.md)
 
 ## Copyright
 Auto-Editor is under the [Public Domain](https://github.com/WyattBlue/auto-editor/blob/master/LICENSE) but contains non-free elements. See [this page](https://github.com/WyattBlue/auto-editor/blob/master/articles/legalinfo.md) for more info.

articles/rangeSyntax.md

@@ -45,26 +45,30 @@ or used byitself.
 auto-editor example.mp4 --ignore 20-30
 ```
 
-both `--cut_out` and `--ignore` use range syntax so any range that is recognized by `--cut_out` will be recongized `--ignore` or any future option that uses it.
+both `--cut_out` and `--ignore` use range syntax so any range that is recognized by `--cut_out` will be recognize `--ignore` or any future option that uses it.
 
 ## Range Syntax
 
 Range syntax is a special data type for declaring ranges.
 
-It follows the pattern: `{float}-{float} ...` using a hythen to delimate between the start and end point, and is in seconds instead of the usual "frames" unit.
+It follows the pattern: `{float}-{float} ...` using a hyphen to deliminate between the start and end point, and is in seconds instead of the usual "frames" unit.
 
 It can be repeated infinitely. So
 
 ```
 auto-editor example.mp4 --cut_out 0-10 20-30 40-45
 ```
 
-is possible.
+is possible. In addition, the special values `start` and `end` can be used instead of floats. `end` represents the total length of the video in seconds while `start` is just equivalent to `0`.
 
 
 ### Out-of-bounds and Edge Cases.
 
-Range syntax is gracious on what it allows.
+Going out-of-bounds don't cause an error.
 
-You can go out of bounds.
+```
+auto-editor example.mp4 --cut_out 10-500
+```
+
+Using an invalid range, ex (`10-5`) is Undefined Behavior.