error: make ParseError inherit from HintException

mercurial/dispatch.py

@@ -107,6 +107,8 b' def dispatch(req):'
         return -1
     except error.ParseError as inst:
         _formatparse(ferr.write, inst)
+        if inst.hint:
+            ferr.write(_("(%s)\n") % inst.hint)
         return -1
 
     msg = ' '.join(' ' in a and repr(a) or a for a in req.args)
@@ -202,6 +204,8 b' def _runcatch(req):'
                 (inst.args[0], " ".join(inst.args[1])))
     except error.ParseError as inst:
         _formatparse(ui.warn, inst)
+        if inst.hint:
+            ui.warn(_("(%s)\n") % inst.hint)
         return -1
     except error.LockHeld as inst:
         if inst.errno == errno.ETIMEDOUT:

mercurial/error.py

@@ -81,7 +81,7 b' class ResponseExpected(Abort):'
 class OutOfBandError(HintException):
     """Exception raised when a remote repo reports failure"""
 
-class ParseError(Exception):
+class ParseError(HintException):
     """Raised when parsing config files and {rev,file}sets (msg[, pos])"""
 
 class UnknownIdentifier(ParseError):