py3: pass a bytes value for "msg" to nouideprecwarn()

That function formats "msg" with the "version" value. On Python 3, this
leads to "TypeError: can only concatenate str (not "bytes") to str".

Also eliminate spurious strings concatenation in single-line
declarations.

Differential Revision: https://phab.mercurial-scm.org/D7373

mercurial/pure/parsers.py

@@ -49,7 +49,7 b' def offset_type(offset, type):'
 class BaseIndexObject(object):
     @property
     def nodemap(self):
-        msg = "index.nodemap is deprecated, " "use index.[has_node|rev|get_rev]"
+        msg = b"index.nodemap is deprecated, use index.[has_node|rev|get_rev]"
         util.nouideprecwarn(msg, b'5.3', stacklevel=2)
         return self._nodemap
 

mercurial/revlog.py

@@ -207,7 +207,7 b' indexformatv0_unpack = indexformatv0.unp'
 class revlogoldindex(list):
     @property
     def nodemap(self):
-        msg = "index.nodemap is deprecated, " "use index.[has_node|rev|get_rev]"
+        msg = b"index.nodemap is deprecated, use index.[has_node|rev|get_rev]"
         util.nouideprecwarn(msg, b'5.3', stacklevel=2)
         return self._nodemap
 
@@ -657,15 +657,15 b' class revlog(object):'
     @property
     def nodemap(self):
         msg = (
-            "revlog.nodemap is deprecated, "
-            "use revlog.index.[has_node|rev|get_rev]"
+            b"revlog.nodemap is deprecated, "
+            b"use revlog.index.[has_node|rev|get_rev]"
         )
         util.nouideprecwarn(msg, b'5.3', stacklevel=2)
         return self.index.nodemap
 
     @property
     def _nodecache(self):
-        msg = "revlog._nodecache is deprecated, use revlog.index.nodemap"
+        msg = b"revlog._nodecache is deprecated, use revlog.index.nodemap"
         util.nouideprecwarn(msg, b'5.3', stacklevel=2)
         return self.index.nodemap