Updated references to 'epsilon'

regex/compile.go

@@ -867,7 +867,7 @@ func thompson(re []postfixNode) (Reg, error) {
 			stateToAdd.isEmpty = false
 			if c.nodetype == assertionNode {
 				stateToAdd.isEmpty = true                 // This is a little weird. A lookaround has the 'isEmpty' flag set, even though it _isn't_ empty (the contents are the regex). But, there's so much error-checking that relies on this flag that it's better to keep it this way.
-				stateToAdd.content = newContents(EPSILON) // Ideally, an assertion shouldn't have any content, since it doesn't say anything about the content of string
+				stateToAdd.content = newContents(epsilon) // Ideally, an assertion shouldn't have any content, since it doesn't say anything about the content of string
 				if c.lookaroundDir == 0 || c.lookaroundSign == 0 {
 					switch c.contents[0] {
 					case '^':
@@ -920,7 +920,7 @@ func thompson(re []postfixNode) (Reg, error) {
 		if c.nodetype == lparenNode || c.nodetype == rparenNode {
 			s := &nfaState{}
 			s.assert = noneAssert
-			s.content = newContents(EPSILON)
+			s.content = newContents(epsilon)
 			s.isEmpty = true
 			s.output = make([]*nfaState, 0)
 			s.output = append(s.output, s)