chore: fix some minor issues in the comments (#3439)

Signed-off-by: suranmiao <solsui@outlook.com>

README.md

@@ -258,7 +258,7 @@ abbr -a --position anywhere -- -h '-h | bat -plhelp'
 This way, you can keep on using `cp --help`, but get colorized help pages.
 
 Be aware that in some cases, `-h` may not be a shorthand of `--help` (for example with `ls`). In cases where you need to use `-h` 
-as a command argument you can prepend `\` to the arguement (eg. `ls \-h`) to escape the aliasing defined above. 
+as a command argument you can prepend `\` to the argument (eg. `ls \-h`) to escape the aliasing defined above. 
 
 Please report any issues with the help syntax in [this repository](https://github.com/victor-gp/cmd-help-sublime-syntax).
 

src/vscreen.rs

@@ -346,7 +346,7 @@ impl EscapeSequenceOffsets {
     }
 }
 
-/// An iterator over the offests of ANSI/VT escape sequences within a string.
+/// An iterator over the offsets of ANSI/VT escape sequences within a string.
 ///
 /// ## Example
 ///