Avoid external TR when replacing , with space.

No need for an external tool, Bash can do a global literal substitution itself.

tests/t1300-ls.sh

@@ -53,18 +53,6 @@ test_todo_session 'checking TODOTXT_FINAL_FILTER' <<EOF
 TODO: 3 of 3 tasks shown
 EOF
 
-#
-# check the custom hiding
-#
-test_todo_session 'checking HIDE_CUSTOM_SUBSTITUTION' <<EOF
->>> HIDE_CUSTOM_SUBSTITUTION='[tT]h' todo.sh ls
-2 aaa zzz is line should be first.
-3 bbb yyy is line should be second.
-1 ccc xxx is line should be ird.
---
-TODO: 3 of 3 tasks shown
-EOF
-
 #
 # check the filtering of TERM
 #

todo.sh

@@ -812,9 +812,8 @@ _list() {
             }
           '''  \
         | sed '''
-            s/'"${HIDE_PROJECTS_SUBSTITUTION:-^}"'//g
-            s/'"${HIDE_CONTEXTS_SUBSTITUTION:-^}"'//g
-            s/'"${HIDE_CUSTOM_SUBSTITUTION:-^}"'//g
+            s/'${HIDE_PROJECTS_SUBSTITUTION:-^}'//g
+            s/'${HIDE_CONTEXTS_SUBSTITUTION:-^}'//g
           '''                                                   \
         | eval ${TODOTXT_FINAL_FILTER}                          \
     )
@@ -992,7 +991,7 @@ case $action in
 
     # Split multiple depri's, if comma separated change to whitespace separated
     # Loop the 'depri' function for each item
-    for item in $(echo $* | tr ',' ' '); do
+    for item in ${*//,/ }; do
         getTodo "$item"
 
 	if [[ "$todo" = \(?\)\ * ]]; then
@@ -1016,7 +1015,7 @@ case $action in
 
     # Split multiple do's, if comma separated change to whitespace separated
     # Loop the 'do' function for each item
-    for item in $(echo $* | tr ',' ' '); do
+    for item in ${*//,/ }; do
         getTodo "$item"
 
         # Check if this item has already been done