Update common/expfmt vendoring

vendor/github.com/prometheus/common/expfmt/text_parse.go

@@ -108,6 +108,13 @@ func (p *TextParser) TextToMetricFamilies(in io.Reader) (map[string]*dto.MetricF
 			delete(p.metricFamiliesByName, k)
 		}
 	}
+	// If p.err is io.EOF now, we have run into a premature end of the input
+	// stream. Turn this error into something nicer and more
+	// meaningful. (io.EOF is often used as a signal for the legitimate end
+	// of an input stream.)
+	if p.err == io.EOF {
+		p.parseError("unexpected end of input stream")
+	}
 	return p.metricFamiliesByName, p.err
 }
 

vendor/vendor.json

@@ -159,8 +159,8 @@
 		},
 		{
 			"path": "github.com/prometheus/common/expfmt",
-			"revision": "56b90312e937d43b930f06a59bf0d6a4ae1944bc",
-			"revisionTime": "2015-12-09T21:44:25+01:00"
+			"revision": "23070236b1ebff452f494ae831569545c2b61d26",
+			"revisionTime": "2016-02-11T16:03:55+01:00"
 		},
 		{
 			"path": "github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg",