Describe the bug
templ fmt adds whitespace to blank lines when the line is:

• inside an inline func
• being used to set a struct value
• that is being passed as input to another templ component

Root Cause
The TemplElementExpression.Write method in parser/v2/types.go was formatting Go expressions by comparing the original formatted code with a re-indented version. When lines were identical in both versions (which blank lines always are), it would write them with indentation. This caused blank lines to incorrectly receive tab characters.

The Fix
Added a check before writing lines: if a line is blank (contains only whitespace when trimmed), skip indentation and continue to the next line. This ensures blank lines remain truly blank with no trailing whitespace.

Changes

• Modified TemplElementExpression.Write in parser/v2/types.go to check for blank lines
• Added comprehensive test case inline_func_blank_lines_no_whitespace.txt

Testing

• All existing tests pass
• New test validates the fix for inline functions in three contexts:
  • Regular variable assignment
  • Struct field assignment
  • As templ component arguments
• Manual testing confirms the formatter is now idempotent
• templ fmt can now be safely used in CI without introducing unwanted whitespace

Closes #1165