feat(_comp_compgen_filedir,_comp_compgen_filedir_xspec): don’t sugges…

…t . and ..

bash_completion

@@ -1148,6 +1148,17 @@ _comp_compgen_filedir()
         compopt -o filenames 2>/dev/null
     fi
 
+    # Remove . and .. (as well as */. and */..) from suggestions,
+    # unless .. or */.. was typed explicitly by the user
+    # (for users who use tab-completion to append a slash after '..')
+    if [[ "${cur}" != @(..|*/..) ]]; then
+        local i
+        for i in "${!toks[@]}" ; do
+            [[ "${toks[$i]}" == @(.|..|*/.|*/..) ]] && \
+                unset -v "toks[$i]"
+        done
+    fi
+
     # Note: bash < 4.4 has a bug that all the elements are connected with
     # ${v+"${a[@]}"} when IFS does not contain whitespace.
     local IFS=$' \t\n'
@@ -3042,6 +3053,17 @@ _comp_compgen_filedir_xspec()
 
     ((${#toks[@]})) || return 1
 
+    # Remove . and .. (as well as */. and */..) from suggestions,
+    # unless .. or */.. was typed explicitly by the user
+    # (for users who use tab-completion to append a slash after '..')
+    if [[ "${cur}" != @(..|*/..) ]]; then
+        local i
+        for i in "${!toks[@]}" ; do
+            [[ "${toks[$i]}" == @(.|..|*/.|*/..) ]] && \
+                unset -v "toks[$i]"
+        done
+    fi
+
     compopt -o filenames
     _comp_compgen -RU toks -- -W '"${toks[@]}"'
 }