Replaced http by HTTP if used as the name of the protocol in English.

prometheus/counter.go

@@ -74,7 +74,7 @@ func (c *counter) Add(v float64) {
 // CounterVec is a Collector that bundles a set of Counters that all share the
 // same Desc, but have different values for their variable labels. This is used
 // if you want to count the same thing partitioned by various dimensions
-// (e.g. number of http requests, partitioned by response code and
+// (e.g. number of HTTP requests, partitioned by response code and
 // method). Create instances with NewCounterVec.
 //
 // CounterVec embeds MetricVec. See there for a full list of methods with

prometheus/examples_test.go

@@ -129,7 +129,7 @@ func ExampleCounterVec() {
 	httpReqs := prometheus.NewCounterVec(
 		prometheus.CounterOpts{
 			Name:        "http_requests_total",
-			Help:        "How many HTTP requests processed, partitioned by status code and http method.",
+			Help:        "How many HTTP requests processed, partitioned by status code and HTTP method.",
 			ConstLabels: prometheus.Labels{"env": *binaryVersion},
 		},
 		[]string{"code", "method"},
@@ -200,7 +200,7 @@ func ExampleRegister() {
 		fmt.Println("taskCounter registered.")
 	}
 	// Don't forget to tell the HTTP server about the Prometheus handler.
-	// (In a real program, you still need to start the http server...)
+	// (In a real program, you still need to start the HTTP server...)
 	http.Handle("/metrics", prometheus.Handler())
 
 	// Now you can start workers and give every one of them a pointer to
@@ -240,7 +240,7 @@ func ExampleRegister() {
 
 	// Prometheus will not allow you to ever export metrics with
 	// inconsistent help strings or label names. After unregistering, the
-	// unregistered metrics will cease to show up in the /metrics http
+	// unregistered metrics will cease to show up in the /metrics HTTP
 	// response, but the registry still remembers that those metrics had
 	// been exported before. For this example, we will now choose a
 	// different name. (In a real program, you would obviously not export

prometheus/histogram.go

@@ -270,7 +270,7 @@ func (h *histogram) Write(out *dto.Metric) error {
 // HistogramVec is a Collector that bundles a set of Histograms that all share the
 // same Desc, but have different values for their variable labels. This is used
 // if you want to count the same thing partitioned by various dimensions
-// (e.g. http request latencies, partitioned by status code and method). Create
+// (e.g. HTTP request latencies, partitioned by status code and method). Create
 // instances with NewHistogramVec.
 type HistogramVec struct {
 	MetricVec

prometheus/http.go

@@ -47,7 +47,7 @@ func nowSeries(t ...time.Time) nower {
 }
 
 // InstrumentHandler wraps the given HTTP handler for instrumentation. It
-// registers four metric collectors (if not already done) and reports http
+// registers four metric collectors (if not already done) and reports HTTP
 // metrics to the (newly or already) registered collectors: http_requests_total
 // (CounterVec), http_request_duration_microseconds (Summary),
 // http_request_size_bytes (Summary), http_response_size_bytes (Summary). Each

prometheus/registry.go

@@ -171,7 +171,7 @@ func SetMetricFamilyInjectionHook(hook func() []*dto.MetricFamily) {
 }
 
 // PanicOnCollectError sets the behavior whether a panic is caused upon an error
-// while metrics are collected and served to the http endpoint. By default, an
+// while metrics are collected and served to the HTTP endpoint. By default, an
 // internal server error (status code 500) is served with an error message.
 func PanicOnCollectError(b bool) {
 	defRegistry.panicOnCollectError = b

prometheus/summary.go

@@ -39,7 +39,7 @@ import (
 // Note that the rank estimations cannot be aggregated in a meaningful way with
 // the Prometheus query language (i.e. you cannot average or add them). If you
 // need aggregatable quantiles (e.g. you want the 99th percentile latency of all
-// queries served across all instances of a service), check out the Histogram
+// queries served across all instances of a service), consider the Histogram
 // metric type. See the Prometheus documentation for more details.
 //
 // To create Summary instances, use NewSummary.
@@ -379,7 +379,7 @@ func (s quantSort) Less(i, j int) bool {
 // SummaryVec is a Collector that bundles a set of Summaries that all share the
 // same Desc, but have different values for their variable labels. This is used
 // if you want to count the same thing partitioned by various dimensions
-// (e.g. http request latencies, partitioned by status code and method). Create
+// (e.g. HTTP request latencies, partitioned by status code and method). Create
 // instances with NewSummaryVec.
 type SummaryVec struct {
 	MetricVec