diff --git a/navi b/navi
index 688ea95..d367d76 100755
--- a/navi
+++ b/navi
@@ -35,7 +35,7 @@ source "${SCRIPT_DIR}/src/main.sh"
 ##?    full docs
 ##?       Please refer to the README at https://github.com/denisidoro/navi
 
-VERSION="0.11.0"
+VERSION="0.11.1"
 NAVI_ENV="${NAVI_ENV:-prod}"
 
 opts::eval "$@"
diff --git a/scripts/lint b/scripts/lint
index ca87537..601c3ed 100755
--- a/scripts/lint
+++ b/scripts/lint
@@ -8,7 +8,6 @@ export SCRIPT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
 files_to_lint() {
    find . -iname '*.sh'
    find scripts/*
-   find shell/*
    echo "${SCRIPT_DIR}/test/run"
    echo "${SCRIPT_DIR}/navi"
 }
diff --git a/src/arg.sh b/src/arg.sh
index 466ae79..d422dca 100644
--- a/src/arg.sh
+++ b/src/arg.sh
@@ -36,8 +36,12 @@ arg::next() {
 
 arg::deserialize() {
    local arg="$1"
+
    arg="${arg:1:${#arg}-2}"
-   echo "$arg" | tr "${ARG_DELIMITER}" " " | tr "${ARG_DELIMITER_2}" "'" | tr "${ARG_DELIMITER_3}" '"'
+   echo "$arg" \
+      | tr "${ARG_DELIMITER}" " " \
+      | tr "${ARG_DELIMITER_2}" "'" \
+      | tr "${ARG_DELIMITER_3}" '"'
 }
 
 # TODO: separation of concerns
diff --git a/src/cheat.sh b/src/cheat.sh
index 6409435..53fb17c 100755
--- a/src/cheat.sh
+++ b/src/cheat.sh
@@ -51,15 +51,15 @@ cheat::pretty() {
       /^%/ { tags=" ["substr($0, 3)"]"; next }
       /^#/ { print color(4, $0) color(60, tags); next }
       /^\$/ { next }
-      NF { print color(7, $0) color(60, tags); next }'
+   NF { print color(7, $0) color(60, tags); next }'
 }
 
 cheat::_until_percentage() {
    awk 'BEGIN { count=0; }
 
-      /^%/ { if (count >= 1) exit; 
-             else { count++; print $0; next; } } 
-           { print $0 }'
+      /^%/ { if (count >= 1) exit;
+             else { count++; print $0; next; } }
+   { print $0 }'
 }
 
 cheat::from_selection() {
diff --git a/src/coll.sh b/src/coll.sh
index 24b4473..2240e17 100644
--- a/src/coll.sh
+++ b/src/coll.sh
@@ -46,7 +46,7 @@ coll::add() {
 }
 
 coll::reverse() {
-   tac
+   str::reverse_lines "$@"
 }
 
 coll::set() {
diff --git a/src/selection.sh b/src/selection.sh
index 1179637..86b5e9d 100644
--- a/src/selection.sh
+++ b/src/selection.sh
@@ -29,7 +29,7 @@ selection::cmd_or_comment() {
    else
       echo "$cheat" \
          | grep "^${core}$" -B999 \
-         | tac \
+         | str::reverse_lines \
          | str::last_paragraph_line
    fi
 }
diff --git a/src/str.sh b/src/str.sh
index 65e67d2..3d79273 100644
--- a/src/str.sh
+++ b/src/str.sh
@@ -35,3 +35,13 @@ str::index_last_occurrence() {
 
    awk 'BEGIN{FS=""}{ for(i=1;i<=NF;i++){ if($i=="'"$char"'"){ p=i } }}END{  print p }'
 }
+
+str::reverse_lines() {
+   if command_exists tac; then
+      tac
+   elif command_exists perl; then
+      perl -e 'print reverse <>'
+   else
+      awk '{a[i++]=$0} END {for (j=i-1; j>=0;) print a[j--] }'
+   fi
+}
diff --git a/test/arg_test.sh b/test/arg_test.sh
index 6998cc0..21bf857 100644
--- a/test/arg_test.sh
+++ b/test/arg_test.sh
@@ -2,15 +2,15 @@
 
 interpolation_one_word() {
    echo "curl http://mysite.com/<user>/profile" \
-    | arg::interpolate "user" "john" \
-    | test::equals "curl http://mysite.com/john/profile"
+      | arg::interpolate "user" "john" \
+      | test::equals "curl http://mysite.com/john/profile"
 }
 
 interpolation_multiple_words() {
    echo "cp <file> <new_file>" \
-    | arg::interpolate "file" "C:/Program Files/app/foo.exe" \
-    | arg::interpolate "new_file" "/mnt/c/Users/john/foo.exe" \
-    | test::equals 'cp "C:/Program Files/app/foo.exe" /mnt/c/Users/john/foo.exe'
+      | arg::interpolate "file" "C:/Program Files/app/foo.exe" \
+      | arg::interpolate "new_file" "/mnt/c/Users/john/foo.exe" \
+      | test::equals 'cp "C:/Program Files/app/foo.exe" /mnt/c/Users/john/foo.exe'
 }
 
 test::set_suite "arg"
diff --git a/test/platform_test.sh b/test/platform_test.sh
index 6443d8b..3b06650 100644
--- a/test/platform_test.sh
+++ b/test/platform_test.sh
@@ -2,7 +2,7 @@
 
 existing() {
    platform::existing_command oasida fngo ni awk aoisdn oafm \
-    | test::equals awk
+      | test::equals awk
 }
 
 test::set_suite "platform"