commit bash-20181005 snapshot

doc/bashref.texi

@@ -5451,6 +5451,12 @@ If set, the programmable completion facilities
 (@pxref{Programmable Completion}) are enabled.
 This option is enabled by default.
 
+@item progcomp_alias
+If set, and programmable completion is enabled, Bash treats a command
+name that doesn't have any completions as a possible alias and attempts
+alias expansion. If it has an alias, Bash attempts programmable
+completion using the command word resulting from the expanded alias.
+
 @item promptvars
 If set, prompt strings undergo
 parameter expansion, command substitution, arithmetic