doc: use reST note directive

The 'NOTE: bla bla' syntax was for asciidoc and is still present in a
couple of docstrings. The docstrings will be converted to reST format
when minirst knows how to handle it.

doc/hgrc.5.txt

@@ -139,9 +139,9 changesets. You can define subsequent al
 
     stable5 = latest -b stable
 
-NOTE: It is possible to create aliases with the same names as existing
-commands, which will then override the original definitions. This is
-almost always a bad idea!
+.. note:: It is possible to create aliases with the same names as
+   existing commands, which will then override the original
+   definitions. This is almost always a bad idea!
 
 
 ``auth``
@@ -232,9 +232,9 filtered by the command. The string OUTF
 of an empty temporary file, where the filtered data must be written by
 the command.
 
-NOTE: the tempfile mechanism is recommended for Windows systems, where
-the standard shell I/O redirection operators often have strange
-effects and may corrupt the contents of your files.
+.. note:: The tempfile mechanism is recommended for Windows systems,
+   where the standard shell I/O redirection operators often have
+   strange effects and may corrupt the contents of your files.
 
 The most common usage is for LF <-> CRLF translation on Windows. For
 this, use the "smart" converters which check for binary files::
@@ -575,16 +575,16 variables it is passed are listed with n
   in ``$HG_PARENT2``. If the update succeeded, ``$HG_ERROR=0``. If the
   update failed (e.g. because conflicts not resolved), ``$HG_ERROR=1``.
 
-NOTE: it is generally better to use standard hooks rather than the
-generic pre- and post- command hooks as they are guaranteed to be
-called in the appropriate contexts for influencing transactions.
-Also, hooks like "commit" will be called in all contexts that
-generate a commit (e.g. tag) and not just the commit command.
+.. note:: It is generally better to use standard hooks rather than the
+   generic pre- and post- command hooks as they are guaranteed to be
+   called in the appropriate contexts for influencing transactions.
+   Also, hooks like "commit" will be called in all contexts that
+   generate a commit (e.g. tag) and not just the commit command.
 
-NOTE: Environment variables with empty values may not be passed to
-hooks on platforms such as Windows. As an example, ``$HG_PARENT2`` will
-have an empty value under Unix-like platforms for non-merge
-changesets, while it will not be available at all under Windows.
+.. note:: Environment variables with empty values may not be passed to
+   hooks on platforms such as Windows. As an example, ``$HG_PARENT2``
+   will have an empty value under Unix-like platforms for non-merge
+   changesets, while it will not be available at all under Windows.
 
 The syntax for Python hooks is as follows::