themes/sexy: Refactor coding styles

Co-authored-by: Koichi Murase <myoga.murase@gmail.com>

themes/sexy/sexy.theme.sh

@@ -3,34 +3,36 @@
 # Screenshot: http://cloud.gf3.ca/M5rG
 # A big thanks to \amethyst on Freenode
 
-if [[ $COLORTERM = gnome-* && $TERM = xterm ]]  && infocmp gnome-256color >/dev/null 2>&1; then export TERM=gnome-256color
-elif [[ $TERM != dumb ]] && infocmp xterm-256color >/dev/null 2>&1; then export TERM=xterm-256color
+if [[ $COLORTERM = gnome-* && $TERM = xterm ]] && infocmp gnome-256color &>/dev/null; then
+  export TERM=gnome-256color
+elif [[ $TERM != dumb ]] && infocmp xterm-256color &>/dev/null; then
+  export TERM=xterm-256color
 fi
 
 if tput setaf 1 &> /dev/null; then
-    if [[ $(tput colors) -ge 256 ]] 2>/dev/null; then
-      MAGENTA=$(tput setaf 9)
-      ORANGE=$(tput setaf 172)
-      GREEN=$(tput setaf 190)
-      PURPLE=$(tput setaf 141)
-      WHITE=$(tput setaf 0)
-    else
-      MAGENTA=$(tput setaf 5)
-      ORANGE=$(tput setaf 4)
-      GREEN=$(tput setaf 2)
-      PURPLE=$(tput setaf 1)
-      WHITE=$(tput setaf 7)
-    fi
-    BOLD=$(tput bold)
-    RESET=$(tput sgr0)
+  if [[ $(tput colors) -ge 256 ]] 2>/dev/null; then
+    MAGENTA=$(tput setaf 9)
+    ORANGE=$(tput setaf 172)
+    GREEN=$(tput setaf 190)
+    PURPLE=$(tput setaf 141)
+    WHITE=$(tput setaf 0)
+  else
+    MAGENTA=$(tput setaf 5)
+    ORANGE=$(tput setaf 4)
+    GREEN=$(tput setaf 2)
+    PURPLE=$(tput setaf 1)
+    WHITE=$(tput setaf 7)
+  fi
+  BOLD=$(tput bold)
+  RESET=$(tput sgr0)
 else
-    MAGENTA="\033[1;31m"
-    ORANGE="\033[1;33m"
-    GREEN="\033[1;32m"
-    PURPLE="\033[1;35m"
-    WHITE="\033[1;37m"
-    BOLD=""
-    RESET="\033[m"
+  MAGENTA="\033[1;31m"
+  ORANGE="\033[1;33m"
+  GREEN="\033[1;32m"
+  PURPLE="\033[1;35m"
+  WHITE="\033[1;37m"
+  BOLD=""
+  RESET="\033[m"
 fi
 
 function parse_git_dirty {