regexp: use backquotes for all regular expression examples

This commit performs replace double quote to backquote,
so now all examples looks consistent.

Change-Id: I8cf760ce1bdeff9619a88e531161b9516385241b
GitHub-Last-Rev: e3e636cebbf41528b8a73f9a3fe5afa10876f964
GitHub-Pull-Request: golang/go#28879
Reviewed-on: https://go-review.googlesource.com/c/150397
Reviewed-by: Rob Pike <r@golang.org>
Run-TryBot: Rob Pike <r@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

diff --git a/src/regexp/example_test.go b/src/regexp/example_test.go
index d134a6ba282db7f56c4afb8f916c578a9abb5647..3008c56b6bea94799e0c5c5a4043f338ee8ae832 100644 (file)
--- a/src/regexp/example_test.go
+++ b/src/regexp/example_test.go
@@ -40,11 +40,11 @@ func ExampleMatch() {
 }
 
 func ExampleMatchString() {
-       matched, err := regexp.MatchString("foo.*", "seafood")
+       matched, err := regexp.MatchString(`foo.*`, "seafood")
        fmt.Println(matched, err)
-       matched, err = regexp.MatchString("bar.*", "seafood")
+       matched, err = regexp.MatchString(`bar.*`, "seafood")
        fmt.Println(matched, err)
-       matched, err = regexp.MatchString("a(b", "seafood")
+       matched, err = regexp.MatchString(`a(b`, "seafood")
        fmt.Println(matched, err)
        // Output:
        // true <nil>
@@ -53,13 +53,13 @@ func ExampleMatchString() {
 }
 
 func ExampleQuoteMeta() {
-       fmt.Println(regexp.QuoteMeta("Escaping symbols like: .+*?()|[]{}^$"))
+       fmt.Println(regexp.QuoteMeta(`Escaping symbols like: .+*?()|[]{}^$`))
        // Output:
        // Escaping symbols like: \.\+\*\?\(\)\|\[\]\{\}\^\$
 }
 
 func ExampleRegexp_Find() {
-       re := regexp.MustCompile("foo.?")
+       re := regexp.MustCompile(`foo.?`)
        fmt.Printf("%q\n", re.Find([]byte(`seafood fool`)))
 
        // Output:
@@ -67,7 +67,7 @@ func ExampleRegexp_Find() {
 }
 
 func ExampleRegexp_FindAll() {
-       re := regexp.MustCompile("foo.?")
+       re := regexp.MustCompile(`foo.?`)
        fmt.Printf("%q\n", re.FindAll([]byte(`seafood fool`), -1))
 
        // Output:
@@ -75,7 +75,7 @@ func ExampleRegexp_FindAll() {
 }
 
 func ExampleRegexp_FindAllSubmatch() {
-       re := regexp.MustCompile("foo(.?)")
+       re := regexp.MustCompile(`foo(.?)`)
        fmt.Printf("%q\n", re.FindAllSubmatch([]byte(`seafood fool`), -1))
 
        // Output:
@@ -83,7 +83,7 @@ func ExampleRegexp_FindAllSubmatch() {
 }
 
 func ExampleRegexp_FindSubmatch() {
-       re := regexp.MustCompile("foo(.?)")
+       re := regexp.MustCompile(`foo(.?)`)
        fmt.Printf("%q\n", re.FindSubmatch([]byte(`seafood fool`)))
 
        // Output:
@@ -91,7 +91,7 @@ func ExampleRegexp_FindSubmatch() {
 }
 
 func ExampleRegexp_Match() {
-       re := regexp.MustCompile("foo.?")
+       re := regexp.MustCompile(`foo.?`)
        fmt.Println(re.Match([]byte(`seafood fool`)))
 
        // Output:
@@ -99,7 +99,7 @@ func ExampleRegexp_Match() {
 }
 
 func ExampleRegexp_FindString() {
-       re := regexp.MustCompile("foo.?")
+       re := regexp.MustCompile(`foo.?`)
        fmt.Printf("%q\n", re.FindString("seafood fool"))
        fmt.Printf("%q\n", re.FindString("meat"))
        // Output:
@@ -108,7 +108,7 @@ func ExampleRegexp_FindString() {
 }
 
 func ExampleRegexp_FindStringIndex() {
-       re := regexp.MustCompile("ab?")
+       re := regexp.MustCompile(`ab?`)
        fmt.Println(re.FindStringIndex("tablett"))
        fmt.Println(re.FindStringIndex("foo") == nil)
        // Output:
@@ -117,7 +117,7 @@ func ExampleRegexp_FindStringIndex() {
 }
 
 func ExampleRegexp_FindStringSubmatch() {
-       re := regexp.MustCompile("a(x*)b(y|z)c")
+       re := regexp.MustCompile(`a(x*)b(y|z)c`)
        fmt.Printf("%q\n", re.FindStringSubmatch("-axxxbyc-"))
        fmt.Printf("%q\n", re.FindStringSubmatch("-abzc-"))
        // Output:
@@ -126,7 +126,7 @@ func ExampleRegexp_FindStringSubmatch() {
 }
 
 func ExampleRegexp_FindAllString() {
-       re := regexp.MustCompile("a.")
+       re := regexp.MustCompile(`a.`)
        fmt.Println(re.FindAllString("paranormal", -1))
        fmt.Println(re.FindAllString("paranormal", 2))
        fmt.Println(re.FindAllString("graal", -1))
@@ -139,7 +139,7 @@ func ExampleRegexp_FindAllString() {
 }
 
 func ExampleRegexp_FindAllStringSubmatch() {
-       re := regexp.MustCompile("a(x*)b")
+       re := regexp.MustCompile(`a(x*)b`)
        fmt.Printf("%q\n", re.FindAllStringSubmatch("-ab-", -1))
        fmt.Printf("%q\n", re.FindAllStringSubmatch("-axxb-", -1))
        fmt.Printf("%q\n", re.FindAllStringSubmatch("-ab-axb-", -1))
@@ -152,7 +152,7 @@ func ExampleRegexp_FindAllStringSubmatch() {
 }
 
 func ExampleRegexp_FindAllStringSubmatchIndex() {
-       re := regexp.MustCompile("a(x*)b")
+       re := regexp.MustCompile(`a(x*)b`)
        // Indices:
        //    01234567   012345678
        //    -ab-axb-   -axxb-ab-
@@ -170,7 +170,7 @@ func ExampleRegexp_FindAllStringSubmatchIndex() {
 }
 
 func ExampleRegexp_MatchString() {
-       re := regexp.MustCompile("(gopher){2}")
+       re := regexp.MustCompile(`(gopher){2}`)
        fmt.Println(re.MatchString("gopher"))
        fmt.Println(re.MatchString("gophergopher"))
        fmt.Println(re.MatchString("gophergophergopher"))
@@ -181,7 +181,7 @@ func ExampleRegexp_MatchString() {
 }
 
 func ExampleRegexp_ReplaceAllLiteralString() {
-       re := regexp.MustCompile("a(x*)b")
+       re := regexp.MustCompile(`a(x*)b`)
        fmt.Println(re.ReplaceAllLiteralString("-ab-axxb-", "T"))
        fmt.Println(re.ReplaceAllLiteralString("-ab-axxb-", "$1"))
        fmt.Println(re.ReplaceAllLiteralString("-ab-axxb-", "${1}"))
@@ -192,7 +192,7 @@ func ExampleRegexp_ReplaceAllLiteralString() {
 }
 
 func ExampleRegexp_ReplaceAllString() {
-       re := regexp.MustCompile("a(x*)b")
+       re := regexp.MustCompile(`a(x*)b`)
        fmt.Println(re.ReplaceAllString("-ab-axxb-", "T"))
        fmt.Println(re.ReplaceAllString("-ab-axxb-", "$1"))
        fmt.Println(re.ReplaceAllString("-ab-axxb-", "$1W"))
@@ -205,7 +205,7 @@ func ExampleRegexp_ReplaceAllString() {
 }
 
 func ExampleRegexp_SubexpNames() {
-       re := regexp.MustCompile("(?P<first>[a-zA-Z]+) (?P<last>[a-zA-Z]+)")
+       re := regexp.MustCompile(`(?P<first>[a-zA-Z]+) (?P<last>[a-zA-Z]+)`)
        fmt.Println(re.MatchString("Alan Turing"))
        fmt.Printf("%q\n", re.SubexpNames())
        reversed := fmt.Sprintf("${%s} ${%s}", re.SubexpNames()[2], re.SubexpNames()[1])
@@ -219,12 +219,12 @@ func ExampleRegexp_SubexpNames() {
 }
 
 func ExampleRegexp_Split() {
-       a := regexp.MustCompile("a")
+       a := regexp.MustCompile(`a`)
        fmt.Println(a.Split("banana", -1))
        fmt.Println(a.Split("banana", 0))
        fmt.Println(a.Split("banana", 1))
        fmt.Println(a.Split("banana", 2))
-       zp := regexp.MustCompile("z+")
+       zp := regexp.MustCompile(`z+`)
        fmt.Println(zp.Split("pizza", -1))
        fmt.Println(zp.Split("pizza", 0))
        fmt.Println(zp.Split("pizza", 1))