simplify slice expressions: s[:] => s (#1541)

Found using https://go-critic.github.io/overview#unslice-ref

context_test.go

@@ -978,7 +978,7 @@ func TestContextRenderProtoBuf(t *testing.T) {
 	assert.NoError(t, err)
 
 	assert.Equal(t, http.StatusCreated, w.Code)
-	assert.Equal(t, string(protoData[:]), w.Body.String())
+	assert.Equal(t, string(protoData), w.Body.String())
 	assert.Equal(t, "application/x-protobuf", w.HeaderMap.Get("Content-Type"))
 }
 

gin_test.go

@@ -88,7 +88,7 @@ func TestLoadHTMLGlob(t *testing.T) {
 	}
 
 	resp, _ := ioutil.ReadAll(res.Body)
-	assert.Equal(t, "<h1>Hello world</h1>", string(resp[:]))
+	assert.Equal(t, "<h1>Hello world</h1>", string(resp))
 
 	td()
 }
@@ -101,7 +101,7 @@ func TestLoadHTMLGlob2(t *testing.T) {
 	}
 
 	resp, _ := ioutil.ReadAll(res.Body)
-	assert.Equal(t, "<h1>Hello world</h1>", string(resp[:]))
+	assert.Equal(t, "<h1>Hello world</h1>", string(resp))
 
 	td()
 }
@@ -114,7 +114,7 @@ func TestLoadHTMLGlob3(t *testing.T) {
 	}
 
 	resp, _ := ioutil.ReadAll(res.Body)
-	assert.Equal(t, "<h1>Hello world</h1>", string(resp[:]))
+	assert.Equal(t, "<h1>Hello world</h1>", string(resp))
 
 	td()
 }
@@ -134,7 +134,7 @@ func TestLoadHTMLGlobUsingTLS(t *testing.T) {
 	}
 
 	resp, _ := ioutil.ReadAll(res.Body)
-	assert.Equal(t, "<h1>Hello world</h1>", string(resp[:]))
+	assert.Equal(t, "<h1>Hello world</h1>", string(resp))
 
 	td()
 }
@@ -148,7 +148,7 @@ func TestLoadHTMLGlobFromFuncMap(t *testing.T) {
 	}
 
 	resp, _ := ioutil.ReadAll(res.Body)
-	assert.Equal(t, "Date: 2017/07/01\n", string(resp[:]))
+	assert.Equal(t, "Date: 2017/07/01\n", string(resp))
 
 	td()
 }
@@ -187,7 +187,7 @@ func TestLoadHTMLFiles(t *testing.T) {
 	}
 
 	resp, _ := ioutil.ReadAll(res.Body)
-	assert.Equal(t, "<h1>Hello world</h1>", string(resp[:]))
+	assert.Equal(t, "<h1>Hello world</h1>", string(resp))
 	td()
 }
 
@@ -199,7 +199,7 @@ func TestLoadHTMLFiles2(t *testing.T) {
 	}
 
 	resp, _ := ioutil.ReadAll(res.Body)
-	assert.Equal(t, "<h1>Hello world</h1>", string(resp[:]))
+	assert.Equal(t, "<h1>Hello world</h1>", string(resp))
 	td()
 }
 
@@ -211,7 +211,7 @@ func TestLoadHTMLFiles3(t *testing.T) {
 	}
 
 	resp, _ := ioutil.ReadAll(res.Body)
-	assert.Equal(t, "<h1>Hello world</h1>", string(resp[:]))
+	assert.Equal(t, "<h1>Hello world</h1>", string(resp))
 	td()
 }
 
@@ -230,7 +230,7 @@ func TestLoadHTMLFilesUsingTLS(t *testing.T) {
 	}
 
 	resp, _ := ioutil.ReadAll(res.Body)
-	assert.Equal(t, "<h1>Hello world</h1>", string(resp[:]))
+	assert.Equal(t, "<h1>Hello world</h1>", string(resp))
 	td()
 }
 
@@ -243,7 +243,7 @@ func TestLoadHTMLFilesFuncMap(t *testing.T) {
 	}
 
 	resp, _ := ioutil.ReadAll(res.Body)
-	assert.Equal(t, "Date: 2017/07/01\n", string(resp[:]))
+	assert.Equal(t, "Date: 2017/07/01\n", string(resp))
 
 	td()
 }

render/render_test.go

@@ -287,7 +287,7 @@ func TestRenderProtoBuf(t *testing.T) {
 	err = (ProtoBuf{data}).Render(w)
 
 	assert.NoError(t, err)
-	assert.Equal(t, string(protoData[:]), w.Body.String())
+	assert.Equal(t, string(protoData), w.Body.String())
 	assert.Equal(t, "application/x-protobuf", w.Header().Get("Content-Type"))
 }