bash: standardize on shorthand escape sequences (#3055)

We used a mix of shorthand and octal representations when printing these
control characters. Standardize on the shorter, more readable shorthand
notation because that's what we use in the other shell integration
scripts.

src/shell-integration/bash/ghostty.bash

@@ -148,7 +148,7 @@ function __ghostty_precmd() {
 
     if test "$_ghostty_executing" != ""; then
       # End of current command. Report its status.
-      builtin printf "\033]133;D;%s;aid=%s\007" "$ret" "$BASHPID"
+      builtin printf "\e]133;D;%s;aid=%s\a" "$ret" "$BASHPID"
     fi
 
     # unfortunately bash provides no hooks to detect cwd changes
@@ -160,7 +160,7 @@ function __ghostty_precmd() {
     fi
 
     # Fresh line and start of prompt.
-    builtin printf "\033]133;A;aid=%s\007" "$BASHPID"
+    builtin printf "\e]133;A;aid=%s\a" "$BASHPID"
     _ghostty_executing=0
 }
 
@@ -168,7 +168,7 @@ function __ghostty_preexec() {
     PS0="$_GHOSTTY_SAVE_PS0"
     PS1="$_GHOSTTY_SAVE_PS1"
     PS2="$_GHOSTTY_SAVE_PS2"
-    builtin printf "\033]133;C;\007"
+    builtin printf "\e]133;C;\a"
     _ghostty_executing=1
 }