diff -r c8e8e14a5ee9 -r a51541681b8d mercurial/templater.py
--- a/mercurial/templater.py	Thu Dec 14 20:18:15 2017 +0000
+++ b/mercurial/templater.py	Thu Dec 14 16:01:28 2017 -0500
@@ -918,7 +918,7 @@
     """Return the max of an iterable"""
     if len(args) != 1:
         # i18n: "max" is a keyword
-        raise error.ParseError(_("max expects one arguments"))
+        raise error.ParseError(_("max expects one argument"))
 
     iterable = evalfuncarg(context, mapping, args[0])
     try:
@@ -933,7 +933,7 @@
     """Return the min of an iterable"""
     if len(args) != 1:
         # i18n: "min" is a keyword
-        raise error.ParseError(_("min expects one arguments"))
+        raise error.ParseError(_("min expects one argument"))
 
     iterable = evalfuncarg(context, mapping, args[0])
     try:
@@ -958,7 +958,7 @@
     """Compute obsfate related information based on markers (EXPERIMENTAL)"""
     if len(args) != 1:
         # i18n: "obsfateoperations" is a keyword
-        raise error.ParseError(_("obsfateoperations expects one arguments"))
+        raise error.ParseError(_("obsfateoperations expects one argument"))
 
     markers = evalfuncarg(context, mapping, args[0])
 
@@ -975,7 +975,7 @@
     """Compute obsfate related information based on markers (EXPERIMENTAL)"""
     if len(args) != 1:
         # i18n: "obsfatedate" is a keyword
-        raise error.ParseError(_("obsfatedate expects one arguments"))
+        raise error.ParseError(_("obsfatedate expects one argument"))
 
     markers = evalfuncarg(context, mapping, args[0])
 
@@ -992,7 +992,7 @@
     """Compute obsfate related information based on markers (EXPERIMENTAL)"""
     if len(args) != 1:
         # i18n: "obsfateusers" is a keyword
-        raise error.ParseError(_("obsfateusers expects one arguments"))
+        raise error.ParseError(_("obsfateusers expects one argument"))
 
     markers = evalfuncarg(context, mapping, args[0])