doc: fix typo "used" -> "use"

lencioni · web-flow · commit 3c7819301b5e · 2021-07-14T10:12:30.000-04:00
PR BurntSushi#1936
diff --git a/crates/core/app.rs b/crates/core/app.rs
@@ -1548,7 +1548,7 @@ When specifying multiple ignore files, earlier files have lower precedence
 than later files.
 
 If you are looking for a way to include or exclude files and directories
-directly on the command line, then used -g instead.
+directly on the command line, then use -g instead.
 "
     );
     let arg = RGArg::flag("ignore-file", "PATH")

Original file line number	Diff line number	Diff line change
`@@ -1548,7 +1548,7 @@ When specifying multiple ignore files, earlier files have lower precedence`
`1548`	`1548`	`than later files.`
`1549`	`1549`
`1550`	`1550`	`If you are looking for a way to include or exclude files and directories`
`1551`		`-directly on the command line, then used -g instead.`
	`1551`	`+directly on the command line, then use -g instead.`
`1552`	`1552`	`"`
`1553`	`1553`	`);`
`1554`	`1554`	`let arg = RGArg::flag("ignore-file", "PATH")`