templatefilters: remove redundant 'date' and 'strip' filters

These filters are defined as 'date()' and 'strip()' functions. Help messages
are moved to the corresponding functions.

mercurial/templatefilters.py

@@ -81,12 +81,6 b' def count(i):'
     """:count: List or text. Returns the length as an integer."""
     return len(i)
 
-def datefilter(text):
-    """:date: Date. Returns a date in a Unix date format, including the
-    timezone: "Mon Sep 04 15:13:13 2006 0700".
-    """
-    return util.datestr(text)
-
 def domain(author):
     """:domain: Any text. Finds the first string that looks like an email
     address, and extracts just the domain component. Example: ``User
@@ -348,10 +342,6 b' def stringify(thing):'
         return ""
     return str(thing)
 
-def strip(text):
-    """:strip: Any text. Strips all leading and trailing whitespace."""
-    return text.strip()
-
 def stripdir(text):
     """:stripdir: Treat the text as path and strip a directory level, if
     possible. For example, "foo" and "foo/bar" becomes "foo".
@@ -401,7 +391,6 b' filters = {'
     "age": age,
     "basename": basename,
     "count": count,
-    "date": datefilter,
     "domain": domain,
     "email": email,
     "escape": escape,
@@ -429,7 +418,6 b' filters = {'
     "splitlines": splitlines,
     "stringescape": stringescape,
     "stringify": stringify,
-    "strip": strip,
     "stripdir": stripdir,
     "tabindent": tabindent,
     "upper": upper,

mercurial/templater.py

@@ -313,7 +313,8 b' def buildfunc(exp, context):'
 
 def date(context, mapping, args):
     """:date(date[, fmt]): Format a date. See :hg:`help dates` for formatting
-    strings."""
+    strings. The default is a Unix date format, including the timezone:
+    "Mon Sep 04 15:13:13 2006 0700"."""
     if not (1 <= len(args) <= 2):
         # i18n: "date" is a keyword
         raise error.ParseError(_("date expects one or two arguments"))
@@ -604,7 +605,8 b' def shortest(context, mapping, args):'
                 return shortest
 
 def strip(context, mapping, args):
-    """:strip(text[, chars]): Strip characters from a string."""
+    """:strip(text[, chars]): Strip characters from a string. By default,
+    strips all leading and trailing whitespace."""
     if not (1 <= len(args) <= 2):
         # i18n: "strip" is a keyword
         raise error.ParseError(_("strip expects one or two arguments"))

tests/test-command-template.t

@@ -2498,7 +2498,7 b' Behind the scenes, this will throw Attri'
 Behind the scenes, this will throw ValueError
 
   $ hg tip --template '{author|email|date}\n'
-  abort: template filter 'datefilter' is not compatible with keyword 'author'
+  hg: parse error: date expects a date information
   [255]
 
 Error in nested template: