clarify which regex patterns are supported

golang's regexp supports RE2, so we should mention it in the help. Signed-off-by: Alex Couture-Beil <[email protected]>
alexcb · Nov 25, 2022 · f06085d · f06085d
1 parent 43b0ea1
commit f06085d
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diff --git a/README.md b/README.md
@@ -6,7 +6,7 @@ Reads from stdin and highlights any matched patterns
 
     usage: colorgrep [options] <pattern> [[-i] [-w] [-c <color>] <pattern> [...]] [-- <file>]
 
-    Reads from stdin (or <file> when specified), any regex patterns which match will cause the text to be highlighted.
+    Reads from stdin (or <file> when specified), any RE2 patterns which match will cause the text to be highlighted.
 
       -i           case insensitive matching
       -w           word boundary matching

diff --git a/cmd/main.go b/cmd/main.go
@@ -162,7 +162,7 @@ func main() {
 		fmt.Printf(
 			"usage: %s [options] <pattern> [[-i] [-w] [-c <color>] <pattern> [...]] [-- <file>]\n"+
 				"\n"+
-				"Reads from stdin (or <file> when specified), any regex patterns which match will cause the text to be highlighted.\n"+
+				"Reads from stdin (or <file> when specified), any RE2 patterns which match will cause the text to be highlighted.\n"+
 				"\n"+
 				"  -i           case insensitive matching\n"+
 				"  -w           word boundary matching\n"+