Fix flags_without_count option behavior for empty symbols

[Copilot]

The flags_without_count option was not handling empty symbols correctly. Previously, flags with empty symbols were completely hidden regardless of the option value, but according to the intended behavior, they should show counts when flags_without_count=false (default).

Fixed Behavior

Case 1: Non-empty symbol with count=1

• flags_without_count: false → prints: "S1" (symbol + count)
• flags_without_count: true → prints: "S" (symbol only)

Case 2: Empty symbol with count=1

• flags_without_count: false → prints: "1" (count only)
• flags_without_count: true → prints: "" (nothing)

Case 3: Count is 0

• Always prints "" regardless of flags_without_count value

Changes Made

• Updated formatFlag() function to properly handle empty symbols based on the flags_without_count option
• Modified flags() function to call formatFlag even when symbols are empty (as long as count > 0)
• Added comprehensive test coverage for all flag behavior cases
• Updated README documentation to clarify the option behavior
• Enhanced configuration file comments to explain the new behavior

Example

With a configuration where staged and modified symbols are empty:

symbols:
  staged: ""     # empty symbol  
  modified: ""   # empty symbol
  untracked: "…" # non-empty symbol

Before: Empty symbols were always hidden
After with flags_without_count: false: Shows "2 1 … 3" (counts for empty symbols, symbol+count for non-empty)
After with flags_without_count: true: Shows "…" (only non-empty symbols, no counts)

This change enables users to have full control over flag display behavior, allowing all combinations of symbol presence and count visibility.

Fixes #133.

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[arl]

Looking good. See comments though
@copilot

[arl]

@copilot see requested changes

[arl]

LGTM!