Code cleanup in the test running script

test/run

@@ -34,7 +34,8 @@ main() {
         }
         exec '$(cat cmd | sed -e s/\'/\\\\\'/g)'
         eval -buffer *debug* write debug
-        nop %sh{ IFS==
+        nop %sh{
+          IFS==
           echo \"\$kak_selections\"      > selections
           echo \"\$kak_selections_desc\" > state
         }
@@ -55,7 +56,12 @@ main() {
           echo
           diff -u $test/$dir/$expect $expect | while read -r line; do
             first_character=$(echo "$line" | cut -b 1)
-            color=$(match $first_character + green - red @ magenta none)
+            case $first_character in
+              +) color=green ;;
+              -) color=red ;;
+              @) color=magenta ;;
+              *) color=none ;;
+            esac
             echo "$line" | colorize $color normal
           done
           echo
@@ -79,27 +85,6 @@ main() {
 
 # Utility ├─────────────────────────────────────────────────────────────────────
 
-match() {
-  expression="$1";
-  shift
-  while [ $# > 0 ]; do
-    pattern="$1"
-    shift
-    value="$1"
-    next="$1"
-    default_value="$pattern"
-    if [ -z "$next" ]; then
-      echo $default_value
-      return 1
-    fi
-    if [ "$expression" = "$pattern" ]; then
-      echo "$value"
-      return 0
-    fi
-    shift
-  done
-}
-
 get_ansi_code() {
   color_name=${1:-none}
   style_name=${2:-none}