`$fill` miscounts characters when displaying the `$` character in modules

Bug Report

Current Behavior

For each $ that's printed to the prompt, starship's fill over counts the character by 1 and thus information is not correctly right-aligned.

Expected Behavior

Starship's $fill should correctly calculate the spaces needed to right-align the information printed.

Additional context/Screenshots

Possible Solution

None. Not familiar with Rust.

Disclaimer: the following was suggested by ChatGPT as I was isolating the issue and troubleshooting it.

Issue is with the fact that Starship escapes certain characters in the function shell_prompt_escape in formatter/string_formatter.rs and thus $fill counts the escaped characters which the terminal ends up interpreting and rendering as a single one.

Environment

• Starship version: 1.26.0
• bash version: GNU bash, version 5.3.15(1)-release (aarch64-apple-darwin25.4.0) Copyright (C) 2025 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html

This is free software; you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

• Operating system: Mac OS 26.6.2
• Terminal emulator: WezTerm 20240203-110809-5046fc22
• Git Commit Hash:
• Branch/Tag:
• Rust Version: rustc 1.96.0 (ac68faa20 2026-05-25) (Homebrew)
• Rust channel: release
• Build Time: 2026-06-28 17:02:30 +00:00

Relevant Shell Configuration

Not relevant. I tested starship on a bash session without bashrc using bash --norc and then executing eval "$(starship init bash)".

Starship Configuration

###
# Minimal starship config to reproduce issue with fill miscounting when printing '$' chars
#

# Insert a blank line between shell prompts
add_newline = true

# Continuation prompt
continuation_prompt = '   ▶▶ '

format = """
${custom.user}\
$fill\
${custom.uptime}
${custom.user}\
$fill\
${custom.dollarchar}\
${custom.uptime}
${custom.user}\
$fill\
${custom.dollarchar}\
${custom.dollarchar}\
${custom.uptime}
$character
"""

[fill]
symbol = '-'

[custom.dollarchar]
disabled = false
when = true
format = '\$'

[custom.user]
disabled = false
when = true
format = 'user@machine'

[custom.uptime]
disabled = false
when = true
format = 'Uptime: 10d.10m.10s'

[character]
disabled = false
success_symbol = '[❯](bold fg:green)'
error_symbol = '[❯](bold fg:red)'
vimcmd_symbol = '[❮](bold fg:green)'
vimcmd_replace_one_symbol = '[❮](bold fg:lavender)'
vimcmd_replace_symbol = '[❮](bold fg:lavender)'
vimcmd_visual_symbol = '[❮](bold fg:yellow)'