Clarify the parser input is unicode.

brian-brazil · brian-brazil · commit 052116d8b9c0 · 2017-06-20T15:59:14.000+01:00
diff --git a/README.md b/README.md
@@ -480,7 +480,7 @@ system.
 
 ```python
 from prometheus_client.parser import text_string_to_metric_families
-for family in text_string_to_metric_families("my_gauge 1.0\n"):
+for family in text_string_to_metric_families(u"my_gauge 1.0\n"):
   for sample in family.samples:
     print("Name: {0} Labels: {1} Value: {2}".format(*sample))
 ```
diff --git a/prometheus_client/parser.py b/prometheus_client/parser.py
@@ -12,7 +12,7 @@
 
 
 def text_string_to_metric_families(text):
-    """Parse Prometheus text format from a string.
+    """Parse Prometheus text format from a unicode string.
 
     See text_fd_to_metric_families.
     """
