Bug 268377 Small typo in emode help

patch by giacomo.magnini@portalis.it r=rginda

extensions/venkman/locales/en-US/chrome/venkman.properties

@@ -539,7 +539,7 @@ cmd.dumpprofile.params = [<file-name>]
 cmd.dumptree.params = <tree> [<depth>]
 
 cmd.emode.params = [<mode>]
-cmd.emode.help   = Sets what action the debugger should take when an error occurs in the debug target.  |emode ignore| ignores all errors, |emode trace| shows a log of the error in the console, and |emode break| stops excecution when an error is thrown.  |emode| without any parameter will display the current error mode.  Note that |emode| controls what happens whan an exception goes uncaught, to control what happens when an exception is *thrown*, use |tmode|.
+cmd.emode.help   = Sets what action the debugger should take when an error occurs in the debug target.  |emode ignore| ignores all errors, |emode trace| shows a log of the error in the console, and |emode break| stops excecution when an error is thrown.  |emode| without any parameter will display the current error mode.  Note that |emode| controls what happens when an exception goes uncaught, to control what happens when an exception is *thrown*, use |tmode|.
 
 cmd.eval.params = <expression>
 cmd.eval.help   = Evaluates <expression> in the scope of the debug target's current frame.  See also: |frame|, |where|, |props|, and |evald|.